Important Reminders for Corporations

Use FEIN

Remember to enter your federal employer identification number (FEIN) on the Maryland corporation tax return and other forms.

Use Activity Code

Be sure to enter the business activity code number on Form 500.

Correspondence

Indicate the following on all correspondence and payments:

• Corporate name
• FEIN
• Tax type
• Tax year

Tax credits

Businesses that claim a credit for the rehabilitation of a heritage structure must complete Form 502H/502S for the Heritage Structure Rehabilitation Tax Credit or the Sustainable Communities Tax Credit. For more information about tax credits, see Business Tax Credits.

Calculation of Corporation Modified Taxable Income

Certain corporations with net operating losses, special deductions, and certain modifications to income are now required to complete and attach Form 500A, which will develop an addition or subtraction modification to arrive at Maryland modified taxable income.