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Forms Forms and Instructions |
| Form 1120 U.S. Corporation Income Tax Return |  | |
| Instructions for Form 1120, U.S. Corporation Income Tax Return |
| Form 8453-C U.S. Corporation Income Tax Declaration for an IRS e-file Return | |
| Form 8878 IRS e-file Signature Authorization for Form 4868 or Form 2350 | |
| Form 8878 (SP) IRS e-file Signature Authorization for Application for Extension of Time to File Form 4868 (SP) or Form 2350 (SP) (Spanish version) | |
| Form 8878-A IRS e-file Electronic Funds Withdrawal Authorization for Form 7004 | |
| Form 8879 IRS e-file Signature Authorization | |
| Form 8879 (SP) IRS e-file Signature Authorization (Spanish version) | |
| Form 8879-B IRS e-file Signature Authorization for Form 1065-B | |
| Form 8879-EO IRS e-file Signature Authorization for an Exempt Organization | |
| Form 8879-EX IRS e-file Signature Authorization for Forms 720, 2290, and 8849 | |
| Form 8879-F IRS e-file Signature Authorization for Form 1041 | |
| Form 8879-I IRS e-file Signature Authorization for Form 1120-F | |
| Form 8879-PE IRS e-file Signature Authorization for Form 1065 | |
| Form 8879-S IRS e-file Signature Authorization for Form 1120S | |
| Publications |
Related Publications
| Publication 1345 Handbook for Authorized IRS e-file Providers of Individual Income Tax Returns |  | |
| Publication 4162 Modernized e-File Test Package for Forms 1120/1120-S/1120-F/7004 | | |
| Publication 4163 Modernized e-File (MeF) Information for Authorized IRS e-file Providers for Business Returns | | |
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