| MW508 Maryland withholding - Monthly Filer | the following month by the 15th |
| MW508 Maryland withholding - Quarterly Filer - Q1 | April 15 |
| MW508 Maryland withholding - Quarterly Filer - Q2 | July 15 |
| MW508 Maryland withholding - Quarterly Filer - Q3 | October 15 |
| MW508 Maryland withholding - Quarterly Filer - Q4 | January 15 |
| Maryland Sales Tax - Monthly Filer | the following month by the 15th |
| Maryland Sales Tax - Quarterly Filer - Q1 | April 15 |
| Maryland Sales Tax - Quarterly Filer - Q2 | July 15 |
| Maryland Sales Tax - Quarterly Filer - Q3 | October 15 |
| Maryland Sales Tax - Quarterly Filer - Q4 | January 15 |
