If it's greyed out that means you already have Plus. You just need to pay for it now.
To pay the TurboTax online account fees by credit card
Click on Tax Tools on the left side of the online program screen.
Then click on Print Center.
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.
