When is the deadline for submitting Form 8453 to the IRS?

The deadline for submitting Form 8453 to the IRS is indeed 3 days after e-filing is acknowledged. Form 8453 serves as a declaration for e-filed tax returns and must be submitted to validate the electronic submission. Once you e-file your taxes, the IRS provides an acknowledgment of the submission, and the subsequent step is to submit Form 8453 within the specified timeframe to ensure that your return is considered complete and processed correctly.

This requirement helps maintain the integrity of electronic filing, confirming that the taxpayer has authorized submission of their sensitive information and that all associated documentation is accounted for. Any delays beyond this 3-day window could result in potential issues with the acceptance of your electronic filing, leading to complications in processing your return.