Connecticut — Amended Income Tax Return for Individuals
More about the Connecticut Form CT-1040X Amended Return
We last updated Connecticut Form CT-1040X in January 2019 from the Connecticut Department of Revenue Services. This form is for income earned in tax year 2018, with tax returns due in April 2019. We will update this page with a new version of the form for 2020 as soon as it is made available by the Connecticut government.
Other Connecticut Individual Income Tax Forms:
In addition to information about Connecticut's income tax brackets, Tax-Brackets.org provides a total of 86 Connecticut income tax forms, as well as many federal income tax forms. Here's a list of some of the most commonly used Connecticut tax forms:
|Form Code||Form Name|
|Tax Instruction Booklet||Form CT-1040 Instruction Booklet|
|Form CT-1040||Connecticut Resident Income Tax Return|
|CT-1040NR/PY Instructions||Tax Instruction Booklet: CT-1040 for Nonresidents/Part-Year Residents|
|Form CT-1040 EXT||Application for Extension of Time to File Connecticut Income Tax Return for Individuals|
|Form CT-1040NR-PY||Nonresident/Part-Year Resident Tax Return|
Disclaimer: While we do our best to keep Form CT-1040X up to date and complete on Tax-Brackets.org, we cannot be held liable for errors or omissions. Is this form missing or out-of-date? Please let us know so we can fix it!