Autofill Act of 2026

This bill establishes a program requiring the Secretary of the Treasury to provide taxpayers with automated partially pre-populated individual income tax returns. Under this program, taxpayers can download forms such as 1040, 1040A, and 1040EZ, with their return information already filled in from data reported to the Secretary under Chapter 61 and the Social Security Act.

The pre-populated information must be made available within 15 days of receipt and will be offered in both a printable document file for manual use and a computer-readable form for automated tax preparation software. The Secretary is mandated to establish data download standards by October 31, 2026, and make the pre-populated forms available annually on the website by February 15, 2027.

A crucial aspect is that taxpayers retain full responsibility for the accuracy and completeness of their returns, requiring acknowledgment before downloading. To facilitate this, the bill amends existing law to accelerate the filing deadline for certain information returns to January 31, ensuring timely data availability for the pre-population service, with these changes effective for taxable years beginning after December 31, 2025.