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Although it is too late to e-file your return you can still file. As long as you do not have a balance due you will not have a penalty to pay. If you are due a refund then you will wan to file before your time limit of 3 years is past. If you do not file prior to the 3 year date then the IRS is not required to refund the amount to you.There are still a number of online sites that will allow you to prepare your return and print the copies needed to sign and mail.