Make sure both W-2s are entered BEFORE you start the Dependent Care Credit Section. Normally, the Dependent Care Credit Section should ask you about your daycare expenses, but I think if both W-2s aren't entered before this is started, I wonder if Turbotax assumes someone isn't working and won't let you fill this section out (thus thinking box 10 is taxable)? Try deleting the Dependent Care Credit (Form 2441) section after both W-2s are filled out and re-enter your information and see if it asks you for your daycare expenses and fixes the issue?
https://ttlc.intuit.com/turbotax-support/en-us/help-article/small-business-processes/delete-form-244...
