Yes. If you are using TurboTax Online, you pay based on what you enter on your return. So, if you enter information that requires your return to be upgraded, then you would have to pay for the upgrade before filing.
The same thing goes if you add Assist & Review or the Premium Pack.
TurboTax Expert Assist
Get answers to all your tax questions
Our experts are available on-demand, no appointment needed. Get help all year long with TurboTax Expert Assist.