TurboTax only supports their software for the current tax filing year (2018 right now) and three years back. You just flat out can't use TurboTax 2013 to prepare a tax return from six years ago for several reasons.
- It is no longer possible to get the *required* corrections and updates to the program.
- You can not e-file a prior year tax return. The IRS says so. You have to print, sign and mail it to the IRS.
- If the 2013 return will result in you getting a refund, you will not get it. There is a federally mandated 3 year statute of limitations on that. So even if you file the 2013 tax return with a refund due, you will not receive it.
- TurboTax will not honor the 100% Accuracy Guarantee beyond 3 years back.
So you will need to seek professional help from a CPA or EA if you still need to file your 2013 tax return.