How do I purchase TurboTax PLUS so I can get my .tax file?

In TurboTax Free Edition, you can purchase PLUS to unlock your prior-year .tax file.

The exact instructions will vary depending on the status of your 2018 TurboTax Online return (select one):

·         I haven't started a 2018 return yet

·         I started a 2018 return but haven't filed it yet

·         I've already filed my 2018 return

·         How do I purchase PLUS after Ive already filed my 2018 return?

·         How do I get PLUS in TurboTax Online if I havent started a 2018 return yet?

·         How do I pay for PLUS in TurboTax Online?