Can i file 2018 and then file 2016 and 2017 after?

[DoninGA · Accepted solution]

Yes you can file the 2018 return before filing the 2016 and 2017 tax return.  

However, the TurboTax online editions are Only for tax year 2018.  Where asked to enter a 2017 AGI on your 2018 tax return you will need to enter a 0 (zero) for the 2017 AGI since the 2017 tax return has not been filed.

If you choose to use TurboTax for the 2016 and 2017 tax returns you will need to purchase, download and install on a personal computer one of the desktop editions for each tax year from this website - https://turbotax.intuit.com/personal-taxes/past-years-products/

Prior year tax returns can only be printed and mailed, they cannot be e-filed.  When mailing multiple tax years use a separate envelope for each tax year.