Get your taxes done using TurboTax

I'm still a little confused. If I want to amend my 2018 return to include the credit for alternative fuel charging on form 8911, do I delete the form on the 2018 version of TurboTax or do I file the amended return using the 2019 version? 

If I delete the existing 8911 form, how do I use the current version of form 8911? If I use the 2019 TurboTax, the first question it asks is if I'm amending the 2019 tax return, which I am not trying to do.

 

How should I proceed?