How can i download 2014 .tax file? It suggested me to upgrade to plus but why the steps doesn't work for me?Am I already at premium plan? Why can't I download still?

[DoninGA]

See this TurboTax support FAQ for when access to prior year online tax returns expire - https://ttlc.intuit.com/community/prior-year-return/help/when-does-access-to-my-prior-year-turbotax-...

To pay the TurboTax online account fees by credit card so you can access the prior year online tax returns, without completing the 2018 return at this time, click on Tax Tools on the left side of the online program screen. Then click on Print Center. Then click on Print, save or preview this year's return. On the next page, to pay by credit card, click Pay Now. On the next screen just click on the Continue button. The next screen will show a review of your Fees, click on Continue. Complete the next screen to pay by credit card and click Continue.

[Critter]

Unless you have the 2014 program already fully installed on your computer  (including any state programs required) AND it is up to date then you should NOT download the .tax2014 file since you will NOT be able to open it ...  download the PDF  instead.