Title 26 › Subtitle Subtitle F— Procedure and Administration › Chapter 63— ASSESSMENT › Subchapter C— Treatment of Partnerships › Part III— PROCEDURE › § 6235
The IRS usually has three years to change a partnership’s tax year. That three-year period starts from the latest of when the return was filed, the return due date, or when the partnership filed an administrative adjustment request under section 6227. For a change that modifies an imputed underpayment, the time limit is 270 days (plus any extension the IRS agrees to). For changes after a notice of proposed partnership adjustment, the time limit is 330 days (plus any agreed extension). The partnership and the IRS can extend these deadlines by agreement before they end. Exceptions: if the return is false or fraudulent to evade tax, or if no return was filed, there is no time limit. If the partnership left out certain amounts described in section 6501(e)(1), the period is 6 years. A return made by the IRS under section 6020(b) is not treated as the partnership’s return. Special timing rules also apply for information required under sections 6501(c)(8) and 6501(c)(10).
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Internal Revenue Code — Source: USLM XML via OLRC
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26 U.S.C. § 6235
Title 26 — Internal Revenue Code
Last Updated
Apr 5, 2026
Release point: 119-73not60