Internal Revenue Service:  www.irs.gov Use this web site for any Federal forms, instructions, and refund information   Maryland Department of Assessment and Taxation:  www.dat.state.md.us Use this web site for any forms, instructions and info related to Maryland Personal Property Taxes, as well as forming or dissolving a business entity.   Comptroller of Maryland:  www.comp.state.md.us Use this web site for forms and info regarding Maryland income taxes for businesses and individuals, as well as payroll withhholding information and sales tax.   Maryland Division of Unemployment Insurance:  www.dllr.state.md.us/employment/unemployment.html Use this web site to get information on what to do if one of your former employees has applied for unemployment.  Or- if you are that employee- there's information for you too.