If you’re mailing a federal tax return from Florida, the address depends on one thing: whether you’re sending a payment with it. Returns with no payment go to the IRS in Austin, Texas. Returns with a check or money order go to a P.O. box in Charlotte, North Carolina. Florida has no state income tax return for individuals, so the IRS is your only stop.
Form 1040 and 1040-SR Addresses for Florida
The IRS sorts paper returns by state and by whether money is enclosed. Florida sits in a southeastern group that shares processing centers with several other states. Two addresses cover standard individual returns.
No payment enclosed (refund or zero balance):
Department of the Treasury
Internal Revenue Service
Austin, TX 73301-0002
Payment enclosed (check, money order, or Form 1040-V voucher):
Internal Revenue Service
P.O. Box 1214
Charlotte, NC 28201-12141Internal Revenue Service. Where to File Addresses for Taxpayers and Tax Professionals Filing Form 1040 or Form 1040-SR
Both addresses handle Form 1040 and Form 1040-SR, the larger-print version for filers 65 and older. The IRS reassigns processing centers between filing seasons from time to time, so glance at the current year’s Form 1040 instructions before you seal the envelope.
Extension Requests on Form 4868
Form 4868 buys you an automatic six-month extension to file. It does not extend the deadline to pay; interest and the failure-to-pay penalty still run on any balance owed after April 15. The mailing address depends again on whether you’re enclosing money.
Without a payment:
Department of the Treasury
Internal Revenue Service
Austin, TX 73301-0045
With an estimated payment:
Internal Revenue Service
P.O. Box 1302
Charlotte, NC 28201-13022Internal Revenue Service. Application for Automatic Extension of Time To File U.S. Individual Income Tax Return
Amended Returns on Form 1040-X
Correcting a return you already filed means Form 1040-X. For Florida residents, every amended return goes to the same Austin address whether or not a payment is included:
Department of the Treasury
Internal Revenue Service
Austin, TX 73301-00523Internal Revenue Service. Where to File Addresses for Taxpayers and Tax Professionals Filing Form 1040-X
You can also e-file an amended return through tax software, which is considerably faster. Paper 1040-X returns routinely take 16 weeks or longer to process.
Quarterly Estimated Payments on Form 1040-ES
Self-employed workers, freelancers, and anyone else making quarterly estimated payments send Form 1040-ES vouchers to:
Internal Revenue Service
P.O. Box 1300
Charlotte, NC 28201-13004Internal Revenue Service. Correction to the Mailing Addresses in the 2026 Form 1040-ES
The IRS issued a correction to the addresses printed in the 2026 Form 1040-ES booklet, so verify the address above if you’re working from an older copy.
Using FedEx, UPS, or DHL Instead of USPS
The IRS accepts certain private carriers, but only specific service levels count as “timely filed.” Ground and basic services do not qualify. Approved tiers include overnight and two-day services such as FedEx Priority Overnight, UPS Next Day Air, and DHL Express Worldwide.5Internal Revenue Service. Private Delivery Services (PDS)
Private carriers cannot deliver to a P.O. box, so the Charlotte and Austin P.O. box addresses above will not work for them. Florida filers using a private delivery service for any return, extension, or payment should send it to the submission processing center’s street address:
Internal Revenue Submission Processing Center
3651 S IH35
Austin, TX 787416Internal Revenue Service. Submission Processing Center Street Addresses for Private Delivery Service (PDS)
One street address handles both payment and non-payment returns arriving by courier.
Proving You Mailed On Time
Under federal law, the U.S. Postal Service postmark on your envelope counts as your filing date even if the IRS receives it days later.7Office of the Law Revision Counsel. 26 U.S. Code 7502 – Timely Mailing Treated as Timely Filing A postmark alone, though, doesn’t help much if the IRS later says nothing arrived. Send paper returns by USPS Certified Mail with a return receipt. The few extra dollars buy you a defensible record of the mailing date and the delivery date, which matters most when you owe money or are filing close to April 15.
Before You Seal the Envelope
A few mistakes send paper returns straight back. The IRS will not process an unsigned return, and no refund is released until a valid signature is on file.8Internal Revenue Service. Quality Review of the Tax Return – Signing Form 1040 On a joint return, both spouses must sign.
Attach your W-2s to the front of the form. If federal income tax was withheld, attach any Forms 1099-R and W-2G as well. If you received a corrected W-2 (Form W-2c), include both the original and the correction.9Internal Revenue Service. Instructions for Form 1040 (2025) Leave other supporting documents out unless the instructions specifically ask for them.
If you’re enclosing a check or money order, make it payable to “U.S. Treasury,” not “IRS.” Write your name, address, daytime phone number, Social Security number, the tax year, and the form number (for example, “2025 Form 1040”) on the check itself.10Internal Revenue Service. Pay by Check or Money Order
Paper filing doesn’t force you to wait for a paper refund. Enter your bank routing and account numbers on Form 1040 and the IRS will direct-deposit the refund. To split it across up to three accounts, attach Form 8888.11Internal Revenue Service. Get Your Refund Faster: Tell IRS to Direct Deposit Your Refund to One, Two, or Three Accounts