IRS MATH Act of 2025
Sens. Warren and Cassidy Introduce Bipartisan Bill to Force IRS to Explain Tax Errors in Plain Language
The IRS MATH Act of 2025 was recently introduced in the Senate and sent to the Committee on Finance for review. It is currently in the early stages of the legislative process and is not yet scheduled for a vote. The bill is considered active as it waits for the committee to decide on its next steps.
Passage Likelihood
Legislative Progress
Key Points
- The bill requires the IRS to explain math or clerical errors on tax returns in plain language, including the type of error, the relevant law, a description of the problem, and the specific line of the return where the mistake was found.
From policy text
“describe the mathematical or clerical error in comprehensive, plain language, including-- ``(aa) the type of error, ``(bb) the section of this title to which the error relates, ``(cc) a description of the nature of the error, and ``(dd) the specific line of the return on which the error was made”
View in full text - The IRS must provide an itemized breakdown showing exactly how the error changes a taxpayer's numbers, covering adjusted gross income, taxable income, deductions, credits (including the child tax credit, earned income credit, and premium tax credit), total tax owed, and refund amount.
From policy text
“an itemized computation of any direct or incidental adjustments to be made to the return in correction of the error, including any adjustment to the amount of-- ``(aa) adjusted gross income, ``(bb) taxable income, ``(cc) itemized or standard deductions”
View in full text - The deadline for taxpayers to dispute an error must be displayed in bold, 14-point font right next to the taxpayer's address on page one. The IRS is also banned from sending vague lists of potential errors and must instead identify the specific mistake.
From policy text
“display the date by which the taxpayer may request to abate any assessment specified in such notice pursuant to paragraph (2)(A), in bold, font size 14, and immediately next to the taxpayer's address on page 1 of the notice”
View in full text - When a taxpayer successfully disputes an error, the IRS must send a follow-up notice in plain language confirming the change with an itemized computation of all adjustments. Treasury must also create procedures for taxpayers to request abatement in writing, electronically, by phone, or in person.
From policy text
“the Secretary of the Treasury (or such Secretary's delegate) shall provide for procedures by which a taxpayer may request an abatement pursuant to section 6213(b)(1)(B)(i)(V) of the Internal Revenue Code of 1986 in writing, electronically, by telephone, or in person”
View in full text - A pilot program would test whether sending error notices by certified or registered mail with electronic signature confirmation improves taxpayer response rates. The IRS would report to Congress on the results, including the number and dollar amounts of errors and abatements.
From policy text
“implement a pilot program to send a trial number of notices, in an amount which is a statistically significant portion of all such notices, of mathematical or clerical error pursuant to section 6213(b) of the Internal Revenue Code of 1986 by certified or registered mail with e-signature confirmation of receipt”
View in full text
Impact Analysis
Personal Impact
Milestones
Read twice and referred to the Committee on Finance. (text: CR S613)
Sent to a congressional committee for expert review. The committee decides whether this bill moves forward.
Introduced in Senate
The bill was officially filed and given a number. It now enters the legislative queue.
Related News
3 articlesIRS Says You Made a Tax Return Mistake? A New Law Could Help You Fight Back
Signed in December 2025, the IRS MATH Act forces the IRS to provide detailed computations of adjustments and cite the specific tax code section for errors. It also requires the 60-day response deadline to be displayed in bold font on the front page to protect taxpayer appeal rights.
Congress passes bill requiring IRS to clarify math error notices
The Senate passed the IRS MATH Act, requiring notices to include a clear description of the error type and the specific tax return line affected. The bill also implements a pilot program to test sending these critical notices via certified or registered mail.
Congress passes IRS Math and Taxpayer Help Act
Supported by the AICPA, the IRS MATH Act requires the agency to provide itemized computations of adjustments. The legislation aims to reduce taxpayer stress by ensuring they understand why a refund is different than expected and how to access remedies like abatement.
Source Information
Document Type
Congressional Bill
Official Title
IRS MATH Act of 2025
Data Sources
Sponsor
Cosponsors
(1)Analysis generated by AI. Always verify with official sources.