Use the below information to contact the Comptroller of Maryland (they are the only ones who can answer your questions).
The Comptroller of Maryland offers extended telephone assistance hours for CURRENT YEAR Personal Income Tax from February 1 - April 18. Assistance will be available from 8:30 AM until 7:00 PM, Monday through Friday, except for State holidays. We can be reached by calling 410-260-7980 (central Maryland) or 1-800-MD TAXES (outside of Central Maryland). As an alternative for phone assistance, you can send an email to taxhelp@marylandtaxes.gov.
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