| Entity | Date | Help and Support |
|---|---|---|
| 1040 | 10/15/2026 | 1040 IRS filing deadlines |
| 1120 | 9/15/26 or 10/15/26 | 1120 IRS filing deadlines |
| 1065 | 9/15/2026 | 1065 IRS filing deadlines |
| 1041 | 9/30/2026 | 1041 IRS filing deadlines |
| 990 | 11/16/2026 | 990 IRS filing deadlines |
| 5500 | 10/15/2026 | Department of Labor (DOL) 5500 filing deadlines and electronic filing information |
| 2290 | Varies | IRS.gov article: When Form 2290 Taxes are Due |
