IRS Forms and Publications
http://www.irs.gov/formspubs/index.html

Apply for a Federal ID Number (FEIN)
https://sa.www4.irs.gov/sa_vign/newFormSS4.do

Maryland Comptroller Home Page
http://www.marylandtaxes.com

File Maryland Sales Tax or Withholding Tax Online
https://interactive.marylandtaxes.com/Business/osc/SelectApp.asp

Maryland Combined Registration Application Online
Register for sales, withholding and unemployment taxes
https://interactive.marylandtaxes.com/webapps/comptrollercra/entrance.asp

File Quarterly Maryland Unemployment Insurance Report Online
https://secure-2.dllr.state.md.us/webtax/welcome.aspx

Federal EFTPS Online
Report and Pay 941 and 940 taxes
http://www.eftps.gov