Us Post Office Open April 15 2024 Open. The irs considers a tax return filed on time if it is addressed correctly, has enough postage, and is postmarked by the due date. To check the specific operating hours of your local usps location, please visit the.

11, and the postal service will not deliver regular mail or packages on that date. The irs considers a tax return filed on time if it is addressed correctly, has enough postage, and is postmarked by the due date.