The Internal Revenue Service has lots of different addresses for different types of documents being mailed. Here's links to IRS pages on the IRS Web site with the relevant mailing addresses:
- Addresses for sending in a tax return (Form 1040 and related tax forms)
- Addresses for sending in extension forms (Form 4868)
- Addresses for sending in estimated tax payments (Form 1040-ES)
- Addresses for sending mail via a private delivery service (such as DHL, FedEx, or UPS), and be aware that the IRS recognizes only certain types of private delivery services for the purpose of determining whether a tax return was mailed on time.
It's best to send tax-related documents using certified mail with return receipt requested. That way, you'll receive confirmation that the IRS actually received your documents or payment. And this can come in very hand if the tax return or payment gets lost, as you'll have proof of delivery. The United States Postal Service Web site has additional tips for making sure your tax returns are mailed properly.
These links have been updated for the IRS's re-designed Web site.

Thanks William! This was very helpful—exactly what I needed to know.
what if i’m filing back taxes from abroad? do i use the same address? i’ve read that only a few centers process late returns, but haven’t been able to ascertain the answer to this particular question. i’m filing my 2010 taxes late and 2009 (fortunately i don’t owe anything^^)
I’m thankful for that article post.Really thanks! Much obliged.
Totally worthless help
all links broken
was it churchill who said of russia, “a conundrum wrapped inside an enigma covered by a …”??? seems to apply here!
cant find anything. I agree with the guy that said ” Totally worthless help”.
I agree with kathy – this is totally unhelpful – a waste of time
The above comments are totally worthless because you people can’t read. (Check the orange script at the bottom of the page)
Of course I’m talking to people who are almost three years late filing their taxes so that alone should tell me who comprises these commenters.