Can I itemize on my Connecticut return if I claimed the standard deduction on my federal return? No. CT instructions indicate the state taxable income is pulled from the federal return where your deductions have already been considered. Start for $0 today Get your maximum refund with all the deductions and credits you deserve Get Started Login Related articles What type of income can be deducted from my Connecticut return? What type of income needs to be added to my Connecticut return? What is my residency status for Connecticut? Is my retirement income taxable to Connecticut? What's New in 2019 for Connecticut?