March 15th Tax Deadlines

Tomorrow, March 15th, is the first big tax deadline day. There are three tax deadlines on Friday:

First, partnership and S-Corporation returns are due. If your return isn’t completed, file an extension (Form 7004). If you file by mail, use certified mail, return receipt requested. You always want proof of your extension.

Second, Form 3520-A is due. This is one of the two forms for foreign trusts. Again, if your return isn’t completed there’s a simple solution: file Form 7004. You will almost certainly have to mail the extension for a Form 3520-A; you can find where to mail it in the instructions to Form 7004.

Finally, the Form 1042 series (Form 1042, Form 1042-S) are due. These are the information return series regarding payments to non-Americans. You can file Form 1042-S via the FIRE system (if you’re registered); Form 1042 generally has to be mailed to the IRS.

The deadline is a postmark deadline. If you mail your form via certified mail today or tomorrow and it takes a month to get to the IRS, it’s still considered timely (as long as it’s postmarked on or before March 15th). That’s why you want to use certified mail: You get proof (which is a good thing in dealing with the IRS).

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