Title 26 › Subtitle Subtitle F— Procedure and Administration › Chapter 63— ASSESSMENT › Subchapter C— Treatment of Partnerships › Part II— PARTNERSHIP ADJUSTMENTS › § 6225
When a partnership’s tax items are changed for a past year, the partnership must either pay an “imputed underpayment” or else reflect the changes on its books in the adjustment year. If the changes create an imputed underpayment, the partnership must pay that amount in the adjustment year as described in section 6232. If there is no imputed underpayment, the partnership must take the changes into account in the adjustment year. The imputed underpayment is figured by adding up (netting) all the partnership adjustments for the reviewed year and applying the highest tax rate in effect for that reviewed year under section 1 or 11. Certain reallocations between partners that reduce the imputed underpayment are ignored. The IRS must create procedures to modify the imputed underpayment. Those procedures let partners file returns and pay tax that reflect the adjustments, or instead pay and agree to have their tax attributes changed in the IRS’s required form. The IRS can also allow lower tax rates for amounts allocable to C corporations or for individuals’ capital gains and qualified dividends, ignore amounts for tax‑exempt partners, and provide special rules for publicly traded partnerships and chains of partnerships (including treating S corporations like partnerships). Anything required under these procedures must be filed within the 270‑day period after the notice of proposed partnership adjustment is mailed under section 6231, and any change to the imputed underpayment needs IRS approval. Definitions: reviewed year = the partnership year being adjusted; adjustment year = the partnership year when the adjustment becomes final (by court decision, an administrative adjustment request under section 6227, or notice under section 6231).
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Internal Revenue Code — Source: USLM XML via OLRC
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Citation
26 U.S.C. § 6225
Title 26 — Internal Revenue Code
Last Updated
Apr 5, 2026
Release point: 119-73not60