2021 Tax Deadlines for Filing 2020 Business Returns |
|
| Partnership Tax Deadlines | Due Date |
| Original tax deadline for partnerships (Form 1065) | March 15, 2021 |
| Extension tax deadline for partnerships (Form 1065) | September 15, 2021 |
| S Corporation Tax Deadlines | Due Date |
| Original tax deadline for S Corporations (Form 1120-S) | March 15, 2021 |
| Extension tax deadline for S Corporations (Form 1120-S) | September 15, 2021 |
| C Corporation Tax Deadlines | Due Date |
| Original tax deadline for C Corporations (Form 1120) | April 15, 2021 |
| Extension tax deadline for C Corporations (Form 1120) | October 15, 2021 |
| Sole Proprietor Tax Deadlines | Due Date |
| Original tax deadline for sole proprietors and individuals (Form 1040) | April 15, 2021 |
| Extension tax deadline for sole proprietors and individuals (Form 1040) | October 15, 2021 |
| Nonprofit Tax Deadlines | Due Date |
| Original tax deadline for exempt organizations (Form 990) | May 15*, 2021 |
| Extension tax deadline for exempt organizations (Form 990) | November 15, 2021 |
* May 15 is a Saturday, so the deadline will be the next business day, which is Monday, May 17, 2021.