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    <ReturnTs>2024-05-14T15:03:20Z</ReturnTs>
    <TaxPeriodEndDt>2023-12-31</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmEIN>844621749</PreparerFirmEIN>
      <PreparerFirmName>
        <BusinessNameLine1Txt>RCS Union Software</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>250 12th Ave</AddressLine1Txt>
        <AddressLine2Txt>Suite 150</AddressLine2Txt>
        <CityNm>Coralville</CityNm>
        <StateAbbreviationCd>IA</StateAbbreviationCd>
        <ZIPCd>52241</ZIPCd>
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    </PreparerFirmGrp>
    <ReturnTypeCd>990EZ</ReturnTypeCd>
    <TaxPeriodBeginDt>2023-01-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>380543681</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>International Union UAW Local 539</BusinessNameLine1Txt>
      </BusinessName>
      <BusinessNameControlTxt>INTE</BusinessNameControlTxt>
      <PhoneNum>2317204468</PhoneNum>
      <USAddress>
        <AddressLine1Txt>490 W Western Avenue</AddressLine1Txt>
        <CityNm>Muskegon</CityNm>
        <StateAbbreviationCd>MI</StateAbbreviationCd>
        <ZIPCd>494401041</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>Tyshon Massey</PersonNm>
      <PersonTitleTxt>President</PersonTitleTxt>
      <SignatureDt>2024-05-14</SignatureDt>
      <DiscussWithPaidPreparerInd>1</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <SigningOfficerGrp>
      <PersonFullName>
        <PersonFirstNm>Tyshon</PersonFirstNm>
        <PersonLastNm>Massey</PersonLastNm>
      </PersonFullName>
    </SigningOfficerGrp>
    <PreparerPersonGrp>
      <PreparerPersonNm>Lori Mizlo</PreparerPersonNm>
      <PTIN>P01503856</PTIN>
      <PhoneNum>8667278291</PhoneNum>
      <PreparationDt>2024-03-27</PreparationDt>
    </PreparerPersonGrp>
    <TaxYr>2023</TaxYr>
    <BuildTS>2023-04-26 12:10:37Z</BuildTS>
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      <ScheduleBNotRequiredInd>X</ScheduleBNotRequiredInd>
      <WebsiteAddressTxt>N/A</WebsiteAddressTxt>
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      <ProgramServiceRevenueAmt>0</ProgramServiceRevenueAmt>
      <MembershipDuesAmt>126181</MembershipDuesAmt>
      <InvestmentIncomeAmt>0</InvestmentIncomeAmt>
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      <GrantsAndSimilarAmountsPaidAmt>0</GrantsAndSimilarAmountsPaidAmt>
      <BenefitsPaidToOrForMembersAmt>0</BenefitsPaidToOrForMembersAmt>
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      <OccupancyRentUtltsAndMaintAmt>5344</OccupancyRentUtltsAndMaintAmt>
      <PrintingPublicationsPostageAmt>85</PrintingPublicationsPostageAmt>
      <OtherExpensesTotalAmt>96345</OtherExpensesTotalAmt>
      <TotalExpensesAmt>126902</TotalExpensesAmt>
      <ExcessOrDeficitForYearAmt>2201</ExcessOrDeficitForYearAmt>
      <NetAssetsOrFundBalancesBOYAmt>129532</NetAssetsOrFundBalancesBOYAmt>
      <OtherChangesInNetAssetsAmt>-12058</OtherChangesInNetAssetsAmt>
      <NetAssetsOrFundBalancesEOYAmt>119675</NetAssetsOrFundBalancesEOYAmt>
      <InfoInScheduleOPartIIInd>X</InfoInScheduleOPartIIInd>
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        <EOYAmt>139627</EOYAmt>
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        <EOYAmt>2112</EOYAmt>
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        <EOYAmt>0</EOYAmt>
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        <EOYAmt>119675</EOYAmt>
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      <PrimaryExemptPurposeTxt>Labor Organization</PrimaryExemptPurposeTxt>
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        <DescriptionProgramSrvcAccomTxt>Collective bargaining and representation for 320 members</DescriptionProgramSrvcAccomTxt>
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        <PersonNm>Marvin Andrews</PersonNm>
        <TitleTxt>BARGAINING</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>0</AverageHrsPerWkDevotedToPosRt>
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      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Duane J Canter</PersonNm>
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        <CompensationAmt>0</CompensationAmt>
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      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Ricky E Hancock</PersonNm>
        <TitleTxt>trustee</TitleTxt>
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        <CompensationAmt>106</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Dustin L Leroux</PersonNm>
        <TitleTxt>vice president</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>0.8</AverageHrsPerWkDevotedToPosRt>
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      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Marcus Longmire</PersonNm>
        <TitleTxt>bargaining</TitleTxt>
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        <CompensationAmt>381</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
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      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Tyshon L Massey</PersonNm>
        <TitleTxt>PRESIDENT</TitleTxt>
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      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Larry D McCleary</PersonNm>
        <TitleTxt>recording secretary</TitleTxt>
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      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Adam Miles</PersonNm>
        <TitleTxt>trustee</TitleTxt>
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      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Richard Simmons</PersonNm>
        <TitleTxt>Financial Secretary</TitleTxt>
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      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Robert M Stone</PersonNm>
        <TitleTxt>trustee</TitleTxt>
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        <PersonNm>Tyshon L Massey</PersonNm>
        <USAddress>
          <AddressLine1Txt>490 W Western Avenue</AddressLine1Txt>
          <CityNm>Muskegon</CityNm>
          <StateAbbreviationCd>MI</StateAbbreviationCd>
          <ZIPCd>494401041</ZIPCd>
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        <PhoneNum>2317204468</PhoneNum>
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      <ForeignFinancialAccountInd>0</ForeignFinancialAccountInd>
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      <DonorAdvisedFndsInd>0</DonorAdvisedFndsInd>
      <OperateHospitalInd>0</OperateHospitalInd>
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      <PoliticalCampaignActyInd>0</PoliticalCampaignActyInd>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part I, Line 8</FormAndLineReferenceDesc>
        <ExplanationTxt>Rebate from International Strike Fund $789.27 | Refund - Bank Service Fees $2,133.00</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part I, Line 16</FormAndLineReferenceDesc>
        <ExplanationTxt>Other Expenses: $96,345.32</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part I, Line 16</FormAndLineReferenceDesc>
        <ExplanationTxt>Officer- Non-Tax Travel Per Diem Etc. $398.65 | Others- Non-Tax Travel Per Diem Etc $143.75 | Pension Forward $1,852.80 | Affiliation Fees - NAACP etc. $200.00 | Athletic Part: Bowling League Fees $595.00 | Bank Charges - Svc Fees NSF etc $13,896.34 | Bank Errors(That Decrease Acct Balance) $711.00 | Donations-Charities $460.00 | Donations - Other $250.00 | Flowers Cards Donations in Lieu $200.05 | Hats, Jackets, Shirts (incl. team sports) -Not for resale $4,578.00 | Per Capita Taxes - International $66,479.39 | Per Capita Taxes - CAP Councils $1,271.71 | Per Capita Taxes - Affiliates $1,271.71 | Per Capita Taxes- Retired Workers 65% $22.10 | Soc &amp; Rec Events-Parties &amp; Dances Other $100.00 | Technical and Support Fees $2,928.80 | Telephone $986.02</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part I, Line 20</FormAndLineReferenceDesc>
        <ExplanationTxt>Total other changes: ($12,058)</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part I, Line 20</FormAndLineReferenceDesc>
        <ExplanationTxt>Fixed assets $0; Inventories $0; Liabilities ($12,059); Voided checks from a previous year $0</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
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