How to amend your Connecticut corporation tax return?

To amend your Form CT-1120, Corporation Business Tax Return, or Form CT-1120U, Unitary Corporation Business Tax Return, use Form CT-1120X, Amended Corporation Business Tax Return.

Who is the Commissioner of taxes in Connecticut?

It is my honor to serve the State of Connecticut and you, the taxpayer, as Acting DRS Commissioner. We appreciate the opportunity to answer your questions, provide you with tools and guidance needed to complete tax filings, and report to you on state tax collection and program administration efforts.

When do I have to pay estimated business tax in CT?

Estimated payments are due on the 15 th day of the 3 rd, 6 th, 9 th and 12 th months of the year (March, June, September and December if your corporation has a December 31 st yearend). See IP 2018 (9), Q&A on Estimated Corporation Business Tax and Worksheet CT-1120AE for additional information.

Do you have to file a ct-1120 business tax return?

You must file Form CT-1120, Corporation Business Tax Return, unless your corporation engages in a unitary business with other commonly owned corporations. If your corporation engages in a unitary business with other commonly owned corporations, you must file Form CT-1120CU, Combined Unitary Corporation Business Tax Return.

To amend your Form CT-1120, Corporation Business Tax Return, or Form CT-1120U, Unitary Corporation Business Tax Return, use Form CT-1120X, Amended Corporation Business Tax Return.

It is my honor to serve the State of Connecticut and you, the taxpayer, as Acting DRS Commissioner. We appreciate the opportunity to answer your questions, provide you with tools and guidance needed to complete tax filings, and report to you on state tax collection and program administration efforts.

Estimated payments are due on the 15 th day of the 3 rd, 6 th, 9 th and 12 th months of the year (March, June, September and December if your corporation has a December 31 st yearend). See IP 2018 (9), Q&A on Estimated Corporation Business Tax and Worksheet CT-1120AE for additional information.

You must file Form CT-1120, Corporation Business Tax Return, unless your corporation engages in a unitary business with other commonly owned corporations. If your corporation engages in a unitary business with other commonly owned corporations, you must file Form CT-1120CU, Combined Unitary Corporation Business Tax Return.