Payment is not required until you either e-file or print your return. Have you already filed?
You can downgrade back to the Free Edition if you haven't made payment yet or registered your Free product. Using the "Clear and Start Over" feature will downgrade your product. Just keep in mind that all of your data entry will be deleted. Here's a TurboTax FAQ with instructions.
https://ttlc.intuit.com/replies/4248526
HOWEVER, you probably are required to use the paid Deluxe edition in order to properly file your return this year. Many users who have been able to file using the Free Edition in the past are now requiring a paid edition to file. See the info below for more explanation.
https://ttlc.intuit.com/replies/4223394
*** I am NOT a tax expert. I am a seasoned TurboTax user, and volunteer to provide assistance to TT users. Nothing I post is to be considered TAX ADVICE; I bear no legal liability for responses.***
