Can I pay turbotax today to take advantage of the early savings but still make edits and file later?

Yes, you can.

To pay the TurboTax online account fees by credit card, without completing the 2021 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. 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.

Yes,  To pay now say you want to print your return and it will make you pay with a credit card.
https://ttlc.intuit.com/community/printing/help/can-i-print-a-copy-of-my-turbotax-online-return-before-i-file-it/01/26244