Connecticut State Department of Revenue Services

HOLIDAY: The Department of Revenue Services will be closed on Thursday, June 19th, a state holiday.

WEBINAR: DRS will be holding a webinar on Wednesday, June 25, 2025, at 10:00 a.m.  This session will provide an overview of the sales and use tax requirements pertaining to Sales and Use Taxes: Selling at Antique Shows, Craft Shows, Fairs, Farmer’s Markets, or Flea Markets. Select here to register.

Unrelated Business Tax

Name  Description  Revised Date  Due Date 
CT-990T 2018 Connecticut Unrelated Business Income Tax Return  12/2018  
CT-990T - INST. Unrelated Business Income Tax Return (Instructions)  12/2018  
CT-990T EXT Application for Extension of Time to File Unrelated Business Income Tax Return  12/2018  
CT-990T ES (ESA,ESB,ESC,ESD)  2019 Estimated Unrelated Business Income Tax Payment Coupons  12/2018  
CT-990T ES (ESA,ESB,ESC,ESD) 2018 Estimated Unrelated Business Income Tax Payment Coupons  12/2017