To my knowledge, TubrboTax doesn' support e-filing of prior years' tax returns. But you can print it out on paper and submit them in paper form. The only downside is if you have a refund, you will have to wait longer to get it back.
If the refund is big enough, consider hiring a tax professional to complete your tax return and e-file it. If you have already completed your tax return in TurboTax, some professional software can import your TT data into their professional tax software. That may save you some tax prep fee. Talk to the tax pro if s/he can import your TT file and ask for a quote. Good luck!
