I found this in the guarantee. It will cover 2023 for 7 years going forward. Not back 7 years of returns.
https://turbotax.intuit.com/corp/license/online/
The TurboTax Accurate Calculation Guarantee is for the lifetime of your 2023 individual tax return, which Intuit defines as seven (7) years from the date you filed it using TurboTax Online. The Guarantee applies only to individual returns filed using TurboTax (excluding business returns), and only if filed with the IRS or, in the case of state returns, the relevant state tax authority, all subject to the terms below:
