Comptroller of Maryland - Information for Business Taxpayers
- Resources for business taxpayers including starting a new business,regulations, information and forms for employer withholding, tax filing information and forms, payment information, sales and use, filing extensions and due dates.
- http://business.marylandtaxes.com/

The Maryland Association of Assessing Officers
- Aims to promote, educate and enhance the appraisal profession for ad valorem purposes. Closely tied to State Department of Assessments and Taxation. Includes executive board, membership, newsletter, bylaws, and events.
- http://www.maao-md.org/

Online Tax Filing System
- A free online tax filing system provided by the Comptroller of Maryland for 123, 502 and 503 filers.
- https://ifile.marylandtaxes.com/

Maryland Combined Registration Application
- Online registration for new businesses to set up tax withholding and unemployment accounts.
- https://in1.comp.state.md.us/comptrollercra/entrance.asp

Maryland State Tax Forms and Instruction Booklets for Businesses
- Downloadable income tax and other forms for business tax filing.
- http://business.marylandtaxes.com/taxforms/default.asp

Maryland State Tax Forms and Instruction Booklets for Individuals
- Downloadable income tax and other forms for personal income tax filing.
- http://individuals.marylandtaxes.com/taxforms/default.asp

Maryland Income Tax Refund Status
- Check the status of your tax refund online.
- https://in1.comp.state.md.us/RefundStatus/default.asp

Online Unclaimed Property Database for Maryland
- Search by a person's last name.
- https://in1.comp.state.md.us/unclaim/default.asp

Comptroller of Maryland
- Official site with online information and services for business and individual taxpayers, including setting up tax accounts, assistance with your Maryland taxes, searching for unclaimed property, checking the status of your refund or getting tax forms.
- http://www.marylandtaxes.com/