Ready to sign your tax return? That feels like an easy lift—but some quirks and exceptions can make it challenging for some taxpayers. Here’s what you need to know.

Why It Matters For Taxpayers

A missed or incorrect signature may not feel like a big deal, but it’s a common mistake that taxpayers make at tax time. And there are real-world consequences.

If you file a return without a signature, the IRS will treat it as if it were not filed at all. That means the statute of limitations does not start (extending the time the IRS has to review your return and collect the tax), and late-filing penalties may apply. And if you’re waiting on a tax refund? If you have to resubmit due to a signature goof, expect processing delays.

Signing Your Paper Return

The general rule for signing a federal income tax return is straightforward: The taxpayer must sign and date the return. If you’re signing a paper Form 1040, you’ll find the signature block at the bottom of the second page (for a Form 1040-SR, the signature block is at the bottom of the third page). The IRS requires “wet ink,” meaning that you must sign the original copy by hand—digital, electronic, or typed-font signatures are not valid signatures for Form 1040 or 1040-SR filed on paper.

Don’t assume that not being able to hold a pen properly or not being able to physically sign a return due to a disability or illiteracy means that you can't sign your tax return. You may still be able to. An X mark is legally valid in most states as a signature. If all you can manage is an X, that's your legal signature.

Of course, it helps to have that signature witnessed (and some states may require it) in case there are any questions. But there's nothing in the law that says that your signature must look a certain way, no matter what my fifth-grade teacher had me believe.

Signing Your Electronic Return

If you’re filing........

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