Track a letter

Where to mail your Connecticut state tax return

Mailing your Connecticut Form CT-1040 depends on your situation: Return with payment goes to Department of Revenue Services, PO Box 2977, Hartford, CT 06104-2977, while Return without payment (refund or other forms) goes to Department of Revenue Services, PO Box 2976, Hartford, CT 06104-2976. Pick the address that matches your return below, sign and date the form, and mail it before the deadline.

Return with payment

Department of Revenue Services
PO Box 2977
Hartford, CT  06104-2977

Use this address for a paper Form CT-1040 where return with payment.

Verified September 2026portal.ct.gov

Write it now. We print & mail it for $5.

Type your letter in the browser. We print it, stamp it, and hand it to USPS — usually same business day. No printer, no stamps, no post office.

Mail my Connecticut tax return — $5

$5 flat · postage included · no account needed

  • You write & pay
  • We print & envelope
  • USPS, next business day
  • Confirmation of Mailing emailed

Other mailing addresses

Return without payment (refund or other forms)

Department of Revenue Services
PO Box 2976
Hartford, CT  06104-2976

Use this address for a paper Form CT-1040 where return without payment (refund or other forms).

Your name
Your return address

Department of Revenue ServicesPO Box 2977Hartford, CT 06104-2977

Your letter, printed and mailed for you.

Key facts

  • Connecticut splits paper Form CT-1040 returns by address: return with payment vs. return without payment (refund or other forms) — mailing to the wrong one can delay processing.
  • Make checks or money orders payable to the "Department of Revenue Services".
  • Write "2025 Form CT-1040" and your Social Security number on the check.
  • A mailed return is generally considered filed on time if it is postmarked by the state filing deadline — sign and date it, since an unsigned return isn't considered filed.
  • PostPal prints your return and hands it to USPS the next business day for $5 — no printer, envelope, or trip to the post office.

How to send your letter

  1. 1

    Pick the address that matches your situation

    Connecticut uses a different address depending on whether you're enclosing a payment: Return with payment; Return without payment (refund or other forms). Choose the one below that matches your return.

  2. 2

    Assemble and sign your return

    Attach any required schedules and withholding statements to your Form CT-1040. Sign and date it — an unsigned paper return isn't considered filed.

  3. 3

    Address the envelope exactly

    Use Department of Revenue Services at the address for your situation, shown above. Write "2025 Form CT-1040" and your Social Security number on the check.

  4. 4

    Mail it before the deadline

    A USPS postmark by the filing deadline counts as on time. Upload your return to PostPal and we print, envelope, and mail it within one business day for $5, with a dated confirmation emailed to you.

Common questions

Where do I mail my Connecticut state tax return?

It depends on whether you're enclosing a payment. For "return with payment," mail it to Department of Revenue Services, PO Box 2977, Hartford, CT 06104-2977. For "return without payment (refund or other forms)," mail it to Department of Revenue Services, PO Box 2976, Hartford, CT 06104-2976.

Does it matter which Connecticut address I use?

Yes. Department of Revenue Services routes paper returns by mail code, so sending a payment return to the no-payment address (or vice versa) can delay processing, even though the state and ZIP still get it to the right building.

What do I make my check payable to?

The "Department of Revenue Services". Write your Social Security number and the tax year on the check or money order.

Is a mailed Connecticut return considered on time if it's postmarked by the deadline?

Generally yes — most states, including Connecticut, treat a return as timely filed if it carries a USPS postmark on or before the filing deadline. Keep proof of mailing for your records; PostPal emails you a dated confirmation.

Can PostPal mail my Connecticut tax return for me?

Yes. Upload your completed, signed Form CT-1040 and PostPal prints it and mails it to Department of Revenue Services, PO Box 2977, Hartford, CT 06104-2977 (or your correct address, based on your situation) the next business day for $5, with a dated Confirmation of Mailing.

Sources

Addresses verified September 2026 against official sources. Always confirm on the official site before time-sensitive filings.

Related pages