| State | Return | Late Filing Penalty | Late Payment Penalty | .gov Source | Notes |
| Alabama | Sales and Use Tax Return (Form 2100 series via MAT) | 10% of tax due or $50 (greater) | 10% of tax due | Source | 5/20/26 |
| Alaska | No state sales tax | alaska.gov | 5/20/26 |
| State | Return | Late Filing Penalty | Late Payment Penalty | .gov Source | Notes |
| Alabama | Sales and Use Tax Return (Form 2100 series via MAT) | 10% of tax due or $50 (greater) | 10% of tax due | Source | 5/20/26 |
| Alaska | No state sales tax | alaska.gov | 5/20/26 |