You cannot use TurboTax to prepare returns that far back. If you are that far behind it would be a good idea for you to seek local paid tax help. TurboTax software for years earlier than 2015 is "retired" and cannot be used. And 2015 is on edge of going away, too. So you can only use TT software now for 2016, 2017 and 2018. Today (10-15-2018) is the last day to start a 2018 return online, in fact .
Another option--not ideal-- is to get the paper forms from the IRS and prepare 2012-2015 by hand. Each year has to be prepared separately and each must be mailed separately. You cannot combine income from different tax years on the same return.
https://turbotax.intuit.com/personal-taxes/past-years-products/
If you do want to use TT software for the "later" years, you need to download it to a full PC or Mac, not a mobile device.
Remember to prepare your state return as well—if you live in a state that has a state income tax.
https://www.irs.gov/forms-pubs/prior-year
And....it is too late to receive a tax refund for any tax year earlier than 2016. If you owe tax due, the IRS wants to be paid. You will be subject to late penalties and interest for the amount owed, for which the IRS will bill you later when they receive the return and payment. You may need to set up payment plan if it is bad....
https://www.irs.gov/payments/payment-plans-installment-agreements
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
