Find Account Numbers
Your Federal Employer Identification Number is the nine-digit number located in the upper left part of your withholding return, under the label "FEIN."
Your Maryland Central Registration number is the eight-digit number located to the right of your FEIN, under the label "REGISTRATION NBR."
Closing a Withholding Account
You can close your withholding account by calling 410-260-7980 from Central Maryland, or 1-800-638-2937 from elsewhere, Monday - Friday, 8:30 a.m. - 4:30 p.m.
Please be ready to provide the following information:
- Telephone Number
- Account number
- Reason for closing the account (out of business, no employees, etc.)
- Closing date
You can also close your account by completing and remitting the Final Report Form available in your withholding coupon booklet, or by completing Form MW506FR.