3 - When are my employer withholding reports due?
You are required to fill out a MW506 form on an accelerated, monthly, quarterly, seasonal or annual basis, depending upon the amount of tax withheld. You must file your MW506 form by the due dates, even if no tax was withheld. If no tax is due, file by telephone by calling 410-260-7225. See Filing Withholding Reports for more information about filing withholding reports, due dates, and filing frequency.