Can I get a copy of my 2016 and 2017 tax return? I am willing to pay, but I am having a hard time trying to upgrade to get a copy of my returns.

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

Your message indicates you are using the TurboTax Deluxe online edition.  You only need to pay for the edition you are using to access the prior year online tax returns.  Provided you signed onto the 2018 online account using the exact same User ID you used to create the prior year online accounts.

To pay the TurboTax online account fees by credit card so you can access your prior year online tax returns, 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.