Can I manually change federal tax already paid? Accidentally input a paid amount (not a withheld amount), and now it shows an incorrect federal due amount.

I've not yet filed. During Review, TurboTax popped a notice saying that there was an empty box that needed a number. I misunderstood that number and input the tax owed amount. Apparently that box was to input tax already paid, rather than owed. Now Federal due amount shows that its been paid. I cannot find a way to fix that so that I complete the filing.