| Number | Title | Description |
| MW506A (PDF) | Employer's Return of Income Tax Withheld - Amended | Form used by employers to amend their employer withholding reports. |
| MW506AM (PDF) | Employer's Return of Income Tax Withheld for Accelerated Filers - Amended | Form used by employers filing on an accelerated basis to amend their employer withholding reports. |
| MW506FR (PDF) | Maryland Employer Withholding - Final Return. | Form used by employers who have discontinued or sold their business. To be mailed with the MW506 or MW506M. Mail separately if filed electronically. |