Maryland Tax - General Section 10-103

      (a)      Each county shall have a county income tax on the Maryland taxable income of:

            (1)      each resident, other than a fiduciary, who on the last day of the taxable year:

                  (i)      is domiciled in the county; or

                  (ii)      maintains a principal residence or a place of abode in the county;

            (2)      each personal representative of an estate if the decedent was domiciled in the county on the date of the decedent's death;

            (3)      each resident fiduciary of:

                  (i)      a trust that is principally administered in the county; or

                  (ii)      a trust that is otherwise principally connected to the county and is not principally administered in the State; and

            (4)      except as provided in § 10-806(c) of this title, a nonresident who derives income from salary, wages, or other compensation for personal services for employment in the county.

      (b)      Except for the county income tax, a county, municipal corporation, special taxing district, or other political subdivision may not impose a general local income, earnings, or payroll tax, a general occupational license tax, or a general license or permit tax based on income, earnings, or gross receipts.