• Tax Forms, Tax Tips, Brochures and Instructions: These are available online at . www.marylandtaxes.gov. and branch offices of the Comptroller (see back cover). For forms only, call 410-260-7951. • Telephone: February 1 - April 15, 2022, 8:30 a.m. until. 7:00 p.m., Monday through Friday, call 1-800-MDTAXES (1-