You may need to mail a paper return to the IRS or state agency if:
To print a paper copy of your return:
Before mailing the return(s), be sure to read the filing instructions. They will include important information such as where to file, what to attach to the return (i.e. W-2s, 1099s, etc.), refund or balance due, information about estimated tax payments, etc.
Notes:
?File your return, schedules, and other attachments on standard size paper. Cutting the paper may cause problems in processing your return.
If you are paper-filing your return because you were rejected on the filing due date, you should also include an explanation and a copy of the IRS rejection with your paper return. This return would need to be mailed within 10 days of your rejection and no later than April 25th.