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How do I resolve Free Fillable Tax Form error F1040-524-01?
Buried on the IRS web site is the "Fillable Forms Error Search Tool". Rather than including an explanation of errors in the rejection email itself, you're expected to copy and paste the error email into this form, which gives more details about what's wrong. (Don't blame me; I didn't design it.) If I copy your error message in, here's the response I get: There is an error with the “primary taxpayer’s Date of Birth” in Step 2 Section 4.  The date of birth that was entered does not match IRS records. Make sure you enter the correct birth date, in the correct format, in the correct space. Scroll down, and enter the current date (“Today’s date”).  Today’s date is the day you intend to e-file the return again. Also, if you are making an electronic payment you must re-date that section. E-File your return. You say that you've already checked your birthday, so I don't know as this is particularly helpful. If you're confident that it's correct and in the right place, I think your next step needs to be contacting the IRS directly. They have a link at the bottom of the error lookup response on how to contact them specifically about their solution not working, or you could try contacting your local IRS office or giving them a call.