Connecticut State Department of Revenue Services

Holiday Closure: The Department of Revenue Services will be closed on Wednesday, December 25th, a state holiday.

Upcoming CT DRS webinar: Select to register for the upcoming Withholding Forms W-2 and 1099 Annual Filing Webinar on Wednesday, January 15, 2025, at 10:00 a.m.

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