Filing process There are a variety of resources to help you understand the filing requirements for employers. Publication 15, (Circular E), Employer's Tax Guide Publication 15 explains your tax, filing and reporting responsibilities as an employer including filing returns for previous years. Publication 15-A, Employer's Supplemental Tax Guide This publication contains specialized and detailed employment tax information supplementing the basic information provided in Publication 15 (Circular E), and tables for withholding on distributions of Indian gaming profits to tribal members. Depositing and reporting employment taxes Learn about what, how and when to report the taxes you deposit and what forms to use. Submitting your completed return What is the address I should mail Form 941? The address for Form 941 can be found in the instructions for the form. Be sure to use the address for governmental entities. Mailing other forms Tax-exempt and government entities, with the exception of employee retirement plans, generally file reports and returns at the same address. How can I e-file my completed forms? Forms 940, 941, 943, 944 and 945 can be submitted electronically, for a small fee, through several secure third-party providers. Requesting an extension to file My organization needs to request an extension Need more time to prepare your federal tax return? Find information on how to apply for an extension of time to file. Please be aware that an extension of time to file your return does not grant you any extension of time to pay your taxes.