﻿<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" returnVersion="2023v5.1" xsi:schemaLocation="http://www.irs.gov/efile">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2024-11-06T11:48:26-08:00</ReturnTs>
    <TaxPeriodEndDt>2024-06-30</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmEIN>861097025</PreparerFirmEIN>
      <PreparerFirmName>
        <BusinessNameLine1Txt>Stamos &amp; Stamos CPA</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>3111 N Tustin St Ste 230</AddressLine1Txt>
        <CityNm>Orange</CityNm>
        <StateAbbreviationCd>CA</StateAbbreviationCd>
        <ZIPCd>92865</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990EZ</ReturnTypeCd>
    <TaxPeriodBeginDt>2023-07-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>330628600</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>Yorba Linda Middle School Instrumental</BusinessNameLine1Txt>
        <BusinessNameLine2Txt>Music Booster Club</BusinessNameLine2Txt>
      </BusinessName>
      <BusinessNameControlTxt>YORB</BusinessNameControlTxt>
      <PhoneNum>7149867080</PhoneNum>
      <USAddress>
        <AddressLine1Txt>4777 Casa Loma Ave</AddressLine1Txt>
        <CityNm>Yorba Linda</CityNm>
        <StateAbbreviationCd>CA</StateAbbreviationCd>
        <ZIPCd>92886</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>Jill Pang</PersonNm>
      <PersonTitleTxt>President</PersonTitleTxt>
      <SignatureDt>2024-11-06</SignatureDt>
      <DiscussWithPaidPreparerInd>true</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <IRSResponsiblePrtyInfoCurrInd>true</IRSResponsiblePrtyInfoCurrInd>
    <PreparerPersonGrp>
      <PreparerPersonNm>CHRIS STAMOS</PreparerPersonNm>
      <PTIN>P00175700</PTIN>
      <PhoneNum>7149980311</PhoneNum>
    </PreparerPersonGrp>
    <TaxYr>2023</TaxYr>
    <BuildTS>2024-10-15 13:58:12Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="4">
    <IRS990EZ documentId="IRS990EZ" referenceDocumentId="IRS990ScheduleO TransfersPersonalBenefitsContr" softwareId="23017517" softwareVersionNum="2023v5.1">
      <MethodOfAccountingCashInd>X</MethodOfAccountingCashInd>
      <ScheduleBNotRequiredInd>X</ScheduleBNotRequiredInd>
      <WebsiteAddressTxt>www.ylmsmusic.org</WebsiteAddressTxt>
      <Organization501c3Ind referenceDocumentId="IRS990ScheduleA">X</Organization501c3Ind>
      <TypeOfOrganizationAssocInd>X</TypeOfOrganizationAssocInd>
      <GrossReceiptsAmt>78405</GrossReceiptsAmt>
      <InfoInScheduleOPartIInd>X</InfoInScheduleOPartIInd>
      <ContributionsGiftsGrantsEtcAmt>44633</ContributionsGiftsGrantsEtcAmt>
      <ProgramServiceRevenueAmt>15155</ProgramServiceRevenueAmt>
      <CostOrOtherBasisExpenseSaleAmt>0</CostOrOtherBasisExpenseSaleAmt>
      <FundraisingGrossIncomeAmt referenceDocumentId="IRS990ScheduleG">18617</FundraisingGrossIncomeAmt>
      <SpecialEventsDirectExpensesAmt>5835</SpecialEventsDirectExpensesAmt>
      <SpecialEventsNetIncomeLossAmt>12782</SpecialEventsNetIncomeLossAmt>
      <CostOfGoodsSoldAmt>0</CostOfGoodsSoldAmt>
      <TotalRevenueAmt>72570</TotalRevenueAmt>
      <PrintingPublicationsPostageAmt>26</PrintingPublicationsPostageAmt>
      <OtherExpensesTotalAmt>69845</OtherExpensesTotalAmt>
      <TotalExpensesAmt>69871</TotalExpensesAmt>
      <ExcessOrDeficitForYearAmt>2699</ExcessOrDeficitForYearAmt>
      <NetAssetsOrFundBalancesBOYAmt>28091</NetAssetsOrFundBalancesBOYAmt>
      <NetAssetsOrFundBalancesEOYAmt>30790</NetAssetsOrFundBalancesEOYAmt>
      <CashSavingsAndInvestmentsGrp>
        <BOYAmt>28091</BOYAmt>
        <EOYAmt>30790</EOYAmt>
      </CashSavingsAndInvestmentsGrp>
      <Form990TotalAssetsGrp>
        <BOYAmt>28091</BOYAmt>
        <EOYAmt>30790</EOYAmt>
      </Form990TotalAssetsGrp>
      <NetAssetsOrFundBalancesGrp>
        <BOYAmt>28091</BOYAmt>
        <EOYAmt>30790</EOYAmt>
      </NetAssetsOrFundBalancesGrp>
      <PrimaryExemptPurposeTxt>The organization's purpose is to assist Yorba Linda Middle School in providing an enriched learning experience for their students in the area of music education by providing additional music expertise and services, instruments, facilitating attire and transportation, and assisting in other ways to enhance the student's experiences and education in the field of music.</PrimaryExemptPurposeTxt>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>Expenditures providing coaches and clinicians to enhance the students musical education, expanding their music experience and performance opportunities.</DescriptionProgramSrvcAccomTxt>
        <ProgramServiceExpensesAmt>19792</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>Expenditures providing music and music supplies to the students.</DescriptionProgramSrvcAccomTxt>
        <ProgramServiceExpensesAmt>3455</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>Provide summer band camp, uniform purchases and concert expenses.</DescriptionProgramSrvcAccomTxt>
        <ProgramServiceExpensesAmt>19776</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>Other expenditures including instrument purchase and repair, transportation, festival entry fees, awards and other expenses enhancing the arts education of the students.</DescriptionProgramSrvcAccomTxt>
        <ProgramServiceExpensesAmt>24125</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <TotalProgramServiceExpensesAmt>67148</TotalProgramServiceExpensesAmt>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Jill Pang</PersonNm>
        <TitleTxt>President</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>6.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Ariana O'Brien</PersonNm>
        <TitleTxt>Co-Treasurer</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>4.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Julia Whiteside</PersonNm>
        <TitleTxt>Co-Treasurer</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>4.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Erin Mann</PersonNm>
        <TitleTxt>Vice President</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>3.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Walter O'Brien</PersonNm>
        <TitleTxt>VP Fundraising</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>3.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Merit Albaiady</PersonNm>
        <TitleTxt>VP Volunteers</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>3.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <ActivitiesNotPreviouslyRptInd>false</ActivitiesNotPreviouslyRptInd>
      <ChgMadeToOrgnzngDocNotRptInd>false</ChgMadeToOrgnzngDocNotRptInd>
      <OrganizationHadUBIInd>false</OrganizationHadUBIInd>
      <SubjectToProxyTaxInd>false</SubjectToProxyTaxInd>
      <OrganizationDissolvedEtcInd>false</OrganizationDissolvedEtcInd>
      <Form1120PolFiledInd>false</Form1120PolFiledInd>
      <MadeLoansToFromOfficersInd>false</MadeLoansToFromOfficersInd>
      <TaxImposedUnderIRC4911Amt>0</TaxImposedUnderIRC4911Amt>
      <TaxImposedUnderIRC4912Amt>0</TaxImposedUnderIRC4912Amt>
      <TaxImposedUnderIRC4955Amt>0</TaxImposedUnderIRC4955Amt>
      <EngagedInExcessBenefitTransInd>false</EngagedInExcessBenefitTransInd>
      <TaxImposedOnOrganizationMgrAmt>0</TaxImposedOnOrganizationMgrAmt>
      <TaxReimbursedByOrganizationAmt>0</TaxReimbursedByOrganizationAmt>
      <ProhibitedTaxShelterTransInd>false</ProhibitedTaxShelterTransInd>
      <BooksInCareOfDetail>
        <PersonNm>Julia Whiteside</PersonNm>
        <USAddress>
          <AddressLine1Txt>4777 Casa Loma Ave</AddressLine1Txt>
          <CityNm>Yorba Linda</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>928863302</ZIPCd>
        </USAddress>
        <PhoneNum>7149867080</PhoneNum>
      </BooksInCareOfDetail>
      <ForeignFinancialAccountInd>false</ForeignFinancialAccountInd>
      <ForeignOfficeInd>false</ForeignOfficeInd>
      <DonorAdvisedFndsInd>false</DonorAdvisedFndsInd>
      <OperateHospitalInd>false</OperateHospitalInd>
      <TanningServicesProvidedInd>false</TanningServicesProvidedInd>
      <RelatedOrganizationCtrlEntInd>false</RelatedOrganizationCtrlEntInd>
      <TransactionWithControlEntInd>false</TransactionWithControlEntInd>
      <PoliticalCampaignActyInd>false</PoliticalCampaignActyInd>
      <LobbyingActivitiesInd>false</LobbyingActivitiesInd>
      <SchoolOperatingInd>false</SchoolOperatingInd>
      <TrnsfrExmptNonChrtblRltdOrgInd>false</TrnsfrExmptNonChrtblRltdOrgInd>
      <PartVIOfCompOfHghstPdEmplTxt>NONE</PartVIOfCompOfHghstPdEmplTxt>
      <PartVIHghstPdCntrctProfSrvcTxt>NONE</PartVIHghstPdCntrctProfSrvcTxt>
      <FiledScheduleAInd>true</FiledScheduleAInd>
    </IRS990EZ>
    <IRS990ScheduleA documentId="IRS990ScheduleA" softwareId="23017517" softwareVersionNum="2023v5.1">
      <PubliclySupportedOrg509a2Ind>X</PubliclySupportedOrg509a2Ind>
      <GiftsGrantsContrisRcvd509Grp>
        <CurrentTaxYearMinus4YearsAmt>19551</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>33307</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>33259</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>36389</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>44633</CurrentTaxYearAmt>
        <TotalAmt>167139</TotalAmt>
      </GiftsGrantsContrisRcvd509Grp>
      <GrossReceiptsAdmissionsGrp>
        <CurrentTaxYearMinus4YearsAmt>12840</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>3149</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>33308</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>26344</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>33771</CurrentTaxYearAmt>
        <TotalAmt>109412</TotalAmt>
      </GrossReceiptsAdmissionsGrp>
      <GrossReceiptsNonUnrltBusGrp>
        <TotalAmt>0</TotalAmt>
      </GrossReceiptsNonUnrltBusGrp>
      <TaxRevLeviedOrgnztnlBnft509Grp>
        <TotalAmt>0</TotalAmt>
      </TaxRevLeviedOrgnztnlBnft509Grp>
      <GovtFurnSrvcFcltsVl509Grp>
        <TotalAmt>0</TotalAmt>
      </GovtFurnSrvcFcltsVl509Grp>
      <Total509Grp>
        <CurrentTaxYearMinus4YearsAmt>32391</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>36456</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>66567</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>62733</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>78404</CurrentTaxYearAmt>
        <TotalAmt>276551</TotalAmt>
      </Total509Grp>
      <AmountsRcvdDsqlfyPersonGrp>
        <TotalAmt>0</TotalAmt>
      </AmountsRcvdDsqlfyPersonGrp>
      <SubstantialContributorsAmtGrp>
        <TotalAmt>0</TotalAmt>
      </SubstantialContributorsAmtGrp>
      <PublicSupportTotal509Amt>276551</PublicSupportTotal509Amt>
      <GrossInvestmentIncome509Grp>
        <CurrentTaxYearMinus1YearAmt>1</CurrentTaxYearMinus1YearAmt>
        <TotalAmt>1</TotalAmt>
      </GrossInvestmentIncome509Grp>
      <Post1975UBTIGrp>
        <TotalAmt>0</TotalAmt>
      </Post1975UBTIGrp>
      <InvestmentIncomeAndUBTIGrp>
        <CurrentTaxYearMinus1YearAmt>1</CurrentTaxYearMinus1YearAmt>
        <TotalAmt>1</TotalAmt>
      </InvestmentIncomeAndUBTIGrp>
      <NetIncomeFromOtherUBIGrp>
        <TotalAmt>0</TotalAmt>
      </NetIncomeFromOtherUBIGrp>
      <OtherIncome509Grp>
        <TotalAmt>0</TotalAmt>
      </OtherIncome509Grp>
      <TotalSupportCalendarYearGrp>
        <CurrentTaxYearMinus4YearsAmt>32391</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>36456</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>66567</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>62734</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>78404</CurrentTaxYearAmt>
        <TotalAmt>276552</TotalAmt>
      </TotalSupportCalendarYearGrp>
      <PublicSupportCY509Pct>1.00000</PublicSupportCY509Pct>
      <PublicSupportPY509Pct>1.00000</PublicSupportPY509Pct>
      <InvestmentIncomeCYPct>0.00000</InvestmentIncomeCYPct>
      <ThirtyThrPctSuprtTestsCY509Ind>X</ThirtyThrPctSuprtTestsCY509Ind>
    </IRS990ScheduleA>
    <IRS990ScheduleG documentId="IRS990ScheduleG" softwareId="23017517" softwareVersionNum="2023v5.1">
      <FundraisingEventInformationGrp>
        <Event1Nm>Letter Writing Campaign</Event1Nm>
        <GrossReceiptsEvent1Amt>9355</GrossReceiptsEvent1Amt>
        <GrossRevenueEvent1Amt>9355</GrossRevenueEvent1Amt>
        <OtherDirectExpensesEvent1Amt>810</OtherDirectExpensesEvent1Amt>
        <GrossReceiptsTotalAmt>9355</GrossReceiptsTotalAmt>
        <GrossRevenueTotalEventsAmt>9355</GrossRevenueTotalEventsAmt>
        <OthDirectExpnssTotalEventsAmt>810</OthDirectExpnssTotalEventsAmt>
        <DirectExpenseSummaryEventsAmt>810</DirectExpenseSummaryEventsAmt>
        <NetIncomeSummaryAmt>8545</NetIncomeSummaryAmt>
      </FundraisingEventInformationGrp>
    </IRS990ScheduleG>
    <IRS990ScheduleO documentId="IRS990ScheduleO" softwareId="23017517" softwareVersionNum="2023v5.1">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.1</FormAndLineReferenceDesc>
        <ExplanationTxt>Clinicians/Instructors $19475</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.2</FormAndLineReferenceDesc>
        <ExplanationTxt>Instrument purchase/repair $16872</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.3</FormAndLineReferenceDesc>
        <ExplanationTxt>Colorguard $9572</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.4</FormAndLineReferenceDesc>
        <ExplanationTxt>IMBC events exp $5361</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.5</FormAndLineReferenceDesc>
        <ExplanationTxt>Summer Band Camp $5280</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.6</FormAndLineReferenceDesc>
        <ExplanationTxt>Music Program/Sheet Music $3772</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.7</FormAndLineReferenceDesc>
        <ExplanationTxt>Uniforms/Cleaning/T-shirts $3047</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.8</FormAndLineReferenceDesc>
        <ExplanationTxt>Awards &amp; Incentives $1429</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.9</FormAndLineReferenceDesc>
        <ExplanationTxt>Misc operating expenses/suppli $905</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.10</FormAndLineReferenceDesc>
        <ExplanationTxt>Drum Major Camp $712</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.11</FormAndLineReferenceDesc>
        <ExplanationTxt>Tax Preparation &amp; Acctg fees $675</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.12</FormAndLineReferenceDesc>
        <ExplanationTxt>Festival fees $665</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.13</FormAndLineReferenceDesc>
        <ExplanationTxt>Big Jazz Concert $500</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.14</FormAndLineReferenceDesc>
        <ExplanationTxt>Travel/Trailer exp $464</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.15</FormAndLineReferenceDesc>
        <ExplanationTxt>Bank Service Charge $440</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.16</FormAndLineReferenceDesc>
        <ExplanationTxt>Insurance $418</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.17</FormAndLineReferenceDesc>
        <ExplanationTxt>Membership fees $209</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.18</FormAndLineReferenceDesc>
        <ExplanationTxt>Charitable Registry Renewal Fe $50</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.21</FormAndLineReferenceDesc>
        <ExplanationTxt>rounding $-1</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>