If you're mailing your tax return on Tax Day, today is the last day to do so unless you file for an extension (in which case you still need to figure out what you owe since an extension to file is not an extension to pay taxes). Mailed federal and state ...

The U.S. Postal Service (USPS) implemented new procedures for dating mail on Dec. 24, postmarking letters and packages with the date they are processed at a postal facility rather than when they are dropped off in a mailbox — a shift that could affect whether time-sensitive mail is considered on time. 

Ready to mail your third-quarter estimated tax payment? Mailing addresses for some Forms 1040-ES have changed. Here’s what you need to know about estimated tax payments—and where to mail them. With just a few days to go before the deadline for third ...