I did not agree to pay an additional $90

Your post indicates you are using the TurboTax Basic Live edition with Tax Expert/CPA support.  That edition is currently $50.  If you have a state tax return that is an additional charge of $40.

If you do not want this edition then clear the return and start over.

If you have not paid for the online edition you are using, have not filed your tax return or registered the Free edition, then you can clear your return and start over with a lower priced edition. Click on Tax Tools on the left side of the program screen while working on the 2019 online tax return. Click on Clear & Start Over.