1st day (Jan. 24th, 2022) Filing your Tax Returns: The Internal Revenue Service starts accepting and processing 2021 tax returns Monday, Jan. 24, 17 days earlier than last tax season’s late start of Feb. 12. When should I receive my 2021 W-2 by? 1. W-2's are due to be mailed no later than Jan. 31. According to the IRS, a 2015 law made it a permanent requirement that employers file copies of their Form W-2, Wage, and Tax Statements, and Form W-3, Transmittal of Wage and Tax Statements, with the S…