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    Internal Revenue Bulletin: 2021-40

    2021-40 - Internal Revenue Bulletin: 2021-402021-40 - Internal Revenue Bulletin: 2021-40
    2021-39 - Internal Revenue Bulletin: 2021-392021-41 - Internal Revenue Bulletin: 2021-41
    Part I - Rulings and Decisions Under the Internal Revenue Code of 1986
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