At this late date, you are only allowed to print and mail them in.
1) IF you used the desktop software. You just finish them off as best you can, and print them out on paper. Sign, Date...attach any W-2 forms, or copies of any other tax forms that show tax withholding. Take to the Post office.... Federal forms go to the IRS, Stat forms to your state. Make sure you use a tracking method at the Post Office Service counter.
2) If you used the Online software, you will need to download some Desktop software to complete them.
Read this procedure:
https://ttlc.intuit.com/questions/2559403-how-do-i-finish-a-prior-year-return-that-i-started-in-turb...
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Get your 2018 taxes done first....then wait a week or two to finish 2017....the PO will be crammed with people filing 2018 for another week..don't get into that crowd.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
