By what date must Form 8453 be mailed to the IRS?

Form 8453, also known as the "U.S. Individual Income Tax Declaration for an IRS e-file Return," must be mailed to the IRS by March 6th of the year following the tax year for which the return is being filed. This timing is crucial because it ensures that the electronic filing process is complete and that the IRS receives the necessary documentation to confirm the taxpayer's identity and their information provided in the e-filed return.

Completing and mailing Form 8453 by this deadline allows taxpayers to comply with IRS requirements and avoid potential delays in processing their tax returns or refunds. It's important for e-filers to pay attention to this deadline to ensure their tax submissions are fully and properly processed by the IRS.