TurboTax bases the Maryland local tax rate on the county or city jurisdiction that you selected when preparing your Maryland tax return. 0.0283 is the rate for Baltimore County. If you do not live in Baltimore County, you selected the wrong jurisdiction. Maryland is claiming that your rate is 0.0320, the rate for Baltimore City, Howard County, Montgomery County, Prince George's County, Queen Anne's County and Wicomico County. The simplest mistake to make would be to indicate that you live in Baltimore County when you actually live in Baltimore City. The only other of these that borders Baltimore County is Howard County.
