Connecticut State Department of Revenue Services

DRS will be holding a webinar on Wednesday, May 14, 2025, at 10:00 a.m.  This session will provide an overview of the sales and use tax requirements pertaining to swimming pool installation, repair, cleaning and maintenance services.  Select here to register.

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