<prompt> Human: So I never filed my taxes last year. I know, big mistake. How would I handle that?  <response>: IRS employee here:I assume you have all the documents you need to prepare and file your return.There is no penalty for filing after the return due date when you are due a refund. If you have a balance due, pay the tax liability in full when you file.Before you mail the return, please be sure to sign and date it and make sure it has your current address. Attach all supporting forms and schedules, and your documents that show federal withholding, like Forms W-2.If you are claiming a refund, do not include direct deposit information. It is likely your return wont be processed before the end of the calendar year, so the Service will mail a paper check to you.If you have a balance due, expect to receive a notice asking for payment of the Failure To File FTF and Failure TO Pay FTP penalties and interest.Mail the federal return to:Department of the TreasuryInternal Revenue ServiceFresno, CA 93888-0002Allow 8 - 10 weeks for processing. If it goes past that and you dont receive your refund or balance due notice, please contact 1-800-829-1040 M - F 7am - 7pm and speak with a representative. They will verify your identity and research the processing status.Thank you for reading. 