Pass-Through Income (510) Maryland: Business - Pass-Through Entity Income Tax Return (Form 510) due

Corporate Income/Franchise (500) Maryland: Business - Corporate Income Tax Return (Form 500) due

Sales & Use (SUT 202) Maryland: Business - Quarterly filers required to file Form SUT 202 for sales and use tax collected in 1st quarter

Sales & Use (SUT 202) Maryland: Business - Monthly filers required to file Form SUT 202 for sales and use tax collected in May

Sales & Use (SUT 202) Maryland: Business - Monthly filers required to file Form SUT 202 for sales and use tax collected in April