Comptroller of Maryland. Serving the People. Peter Franchot, Comptroller
Maryland Taxes
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Information for Tax Professionals
Information for Tax Professionals


Maryland plans to begin processing on the same day the IRS begins accepting returns. No returns will be processed before the start-up dates, even if sent prior to that date.

The IRS will begin accepting all Business tax returns on January 8, 2019.

Maryland started accepting all Business tax returns (paper and E-filed) on January 8, 2019.

The IRS has announced plans to begin accepting all Individual tax returns on January 28, 2019.

Maryland starts accepting all Individual tax returns (paper and E-Filed) on January 28, 2019.

Approved e-File Software Vendors

We maintain lists of approved e-File software vendors.

What's New for the 2019 Tax Filing Season for Tax Professionals

To help make filing your 2018 taxes easier check out What's New for the 2019 Tax Filing Season.

The Maryland Power of Attorney Forms are now available.

Business Withholding Responsibilities

Employers are responsible for ensuring that tax returns are filed and deposits and payments are made, even if the employer contracts with a third party to perform these acts. The employer remains responsible if the third party fails to perform any required action. If the third party fails to make the tax payments, the Comptroller may assess penalties and interest on the employer’s account. The employer is liable for all taxes, penalties and interest due. The employer may also be held personally liable for certain unpaid taxes. To verify that the appropriate returns have been filed and payments have been made, you may contact the Comptroller’s Office at 410-260-7980 from Central Maryland or 1-800-MD TAXES from elsewhere.

Wynne Case

The United States Supreme Court has reached a decision in the Wynne case. The Comptroller's Office has provided a list of Frequently Asked Questions for taxpayers. The FAQs will be updated as additional information becomes available. Please check back frequently.

The Important Information for IFTA - State of Maryland Carriers
  • The Maryland IFTA system, known as the Explore system uses the latest encryption and security technologies to provide for full electronic filing of returns and payments through common web browsers to the State of Maryland. Anyone with Internet access and proper authorization can file an IFTA return, make a payment and request decals electronically though our new IFTA system.
  • Read also important information for IFTA Licenses


  bullet list graphic    e-File for Providers
bullet list graphic    Electronic Filing
  bullet list graphic    Software Developers & Vendors
bullet list graphic    Power of Attorney
  bullet list graphic    Form Updates and Revisions
bullet list graphic    Tax Calculators
  bullet list graphic    Frequently Asked Questions
bullet list graphic    Employer Withholding

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