<prompt> Human: Hello all, So I have been doing my own taxes for a while now. Ive used Taxslayer.com for about 6 years. Never had an issue, still uses my personal info from my previous tax return. I finish the process for E-Filing, Married filing jointly. Within minutes of it getting sent up to the IRS, it gets rejected! Here is the whole message from taxslayer, including the actual IRS message...How do I fix this?The IRS is stating they have already processed and accepted a tax return for this year with the Social Security Number listed on the return. To make certain that you entered your social security number correctly, select Basic Information from the left side of your screen followed by Personal InformationGeneral Information. Verify the correct SSN has been entered for the Primary Taxpayer.If you did not file a Federal return at all this year, contact the IRS immediately at 800-829-1040, as an income tax return has been filed using the Primary Taxpayers SSN. Additionally, if you think you may be a victim of identity theft then you may want to contact your local authorities as well.The IRS will require you to print your return and paper file this year as you will continue to be rejected via e-file. To print your return, select the SummaryPrint tab followed by ViewPrint ReturnPrint Your 2015 Tax Return. Be sure to sign your return and mail to the appropriate IRS mailing address.For video assistance, please click here.Detailed summary for the IRS reject code: Taxpayer TIN in the Return Header must not be the same as a TIN of a previously accepted electronic return for the return type and tax period indicated in the tax return. Additional Info: XXX-XX-XXX it showed my last 4 of ssnI made sure to check that my wifes and my info are still correct. I already have a credit karma account, nothing suspicious at all and Ive also checked my bank statements. I called the IRS, they gave me the number to the Federal Trades Commission and told me to start filling out my taxes in paper form, including a form 14039 for possible identity, and mail it in . Im in the Air Force, and I remember about 2 or 3 months ago there was a data breach. Apparently, a lot of peoples info was compromised. That is really the only thing I can think of that might be related to this. My mom is the only other person that knows my social, maybe, but I dont believe she would ever mess with my stuff like that. Im wondering what more I should do as this is possibly a case of Identity theft.  <response>: If you are a victim of identity theft, the Federal Trade Commission recommends these steps:File a complaint with the FTC at identitytheft.gov.Contact one of the three major credit bureaus to place a fraud alert on your credit records: Equifax, 1-800-766-0008 Experian, 1-888-397-3742 TransUnion, 1-800-680-7289Contact your financial institutions, and close any financial or credit accounts opened without your permission or tampered with by identity thieves.If your SSN is compromised and you know or suspect you are a victim of tax-related identity theft, the IRS recommends these additional steps: Respond immediately to any IRS notice; call the number provided or, if instructed, go to IDVerify.irs.gov. Complete IRS Form 14039, Identity Theft Affidavit if your efiled return rejects because of a duplicate filing under your SSN or you are instructed to do so. Use a fillable form at IRS.gov, print, then attach the form to your return and mail according to instructions.The normal processing time to resolve a tax related ID Theft case is generally within 120 days, but complex cases may take 180 days or longer. Continue to pay your taxes and file your tax return, even if you must do so by paper.After you file your return, the only IRS number you should call until you receive your refund is 1-800-908-4490, M - F 7am - 7pm local time. 