If the wrong mailing address appears on the tax bill or the real property assessment notice (not for personal property taxes), or if a resident would like to change the address to which the tax bills, assessment notices and other correspondence should be mailed, please call the State Department of Assessments & Taxation (SDAT) at 240.314.4510 or visit the SDAT internet website to e-mail a request to the State. Please provide the account number or the address of the property and the resident status. Once the correction is made by SDAT, the County will automatically receive the information from the State. However, please remember that since the State maintains the database, the County can not make any changes to the property tax account including the mailing address.