Connecticut State Department of Revenue Services

Walk-in services at all DRS branch office locations remain suspended. Email DRS at drs@po.state.ct.us. Email the Priority One Taxpayer Assistance Program: DRSPriorityOne_CollectionsAssist@po.state.ct.us. Please check our Frequently Asked Questions page.

Business Entity Prior Years 

Name

Type

Description

OP-424

Form & Instr.

2015-2016 Business Entity Tax Return

OP-424

Form & Instr.

2013-2014 Business Entity Tax Return

OP-424

Form & Instr.

2012 Business Entity Tax Return

OP-424

Form & Instr.

2011 Business Entity Tax Return

OP-424

Form & Instr.

2010 Business Entity Tax Return

OP-424

Form & Instr.

2009 Business Entity Tax Return
OP-424

Form & Instr.

2008 Business Entity Tax Return
OP-424

Form & Instr.

2007 Business Entity Tax Return
OP-424

Form & Instr.

2006 Business Entity Tax Return
OP-424

Form & Instr.

2005 Business Entity Tax Return
OP-424

Form & Instr.

2004 Business Entity Tax Return
OP-424

Form & Instr.

2003 Business Entity Tax Return
OP-424

Form & Instr.

2002 Business Entity Tax Return

File Electronically for FREE! Use the TSC-BUS