CT-1040V: Connecticut Electronic Filing Payment Voucher (2025)
Connecticut · Connecticut DRS · Used for tax years 2025
Form CT-1040V is Connecticut’s 2025 payment voucher for income tax returns filed electronically when payment is made by check. It identifies the taxpayer and the payment amount and is mailed with the check.
Who files this form
Complete Form CT-1040V if you filed your Connecticut income tax return electronically and choose to pay by check. This version is for tax year 2025.
When it's due
For tax year 2025, pay the total tax due on or before April 15, 2026. Any unpaid balance will be subject to penalty and interest.
What you'll need
To pay by mail, prepare:
- The 2025 Form CT-1040V, completed with your name, Social Security Number (SSN), address, and payment amount. For a joint return, include your spouse’s name and SSN.
- A signed check payable to Commissioner of Revenue Services.
Write “2025 CT-1040V e-file” on the front of your check. Adding your SSN to the check is optional.
Do not include a paper copy of your Connecticut income tax return.
How to file
Pay by mail
- Complete the 2025 voucher in blue or black ink. Check the box if this is your first time filing a Connecticut income tax return.
- Make your check payable to Commissioner of Revenue Services. Write “2025 CT-1040V e-file” on the front. You may also add your SSN, but this is optional on the check.
- Sign the check and paper clip it to the front of the voucher. Do not use staples or send cash.
- Make a copy for your records, detach the voucher, and mail it with your payment to:
Department of Revenue Services
State of Connecticut
PO Box 2921
Hartford, CT 06104-2921
Do not send a paper copy of your Connecticut income tax return with the voucher. DRS may submit your check to your bank electronically.
Electronic payment options
Visit myconneCT and select Make a Bill Payment, Estimated Payment or Return Payment.
- Direct payment: Authorize a withdrawal from your checking or savings account on a date you select, up to the due date.
- Credit or debit card: A convenience fee applies. You will see the fee amount and may cancel the transaction. The payment is effective on the date you make the charge.
You will receive a confirmation number at the end of the transaction. Even if you pay electronically, you must still file your return by the due date.
Common mistakes
- Using the wrong year’s voucher: Forms are year specific. Submit the correct year’s form to avoid processing delays.
- Including a paper tax return: Do not send a paper copy of your Connecticut income tax return with this voucher.
- Sending cash or using staples: Send a signed check and paper clip it to the front of the voucher.
- Using ink other than blue or black: Complete the voucher in blue or black ink only.
- Leaving the payment unidentified: Write “2025 CT-1040V e-file” on the front of the check so it can be applied to the correct account. Your SSN is optional on the check.
- Assuming electronic payment replaces filing: You must still file your return by the due date.
- Paying late: Tax not paid by the due date is subject to penalty and interest.
Questions people ask
When do I use Form CT-1040V?
Use it when you have filed your Connecticut income tax return electronically and choose to pay by check.
Do I have to put my SSN on the check?
No. Your SSN is optional on the check. Write “2025 CT-1040V e-file” on the front of the check.
Should I mail a copy of my tax return with the voucher?
No. Do not submit a paper copy of your Connecticut income tax return with this voucher.
Can I pay electronically instead?
Yes. Through myconneCT, you can pay by direct withdrawal from a checking or savings account, or by credit or comparable debit card. Card payments have a convenience fee.
Does paying electronically also file my return?
No. Even if you pay electronically, you must still file your return by the due date.