You should be able to go back to before it asked you if you wanted audit protection and decline it again to get past it.
Are you sure it was audit protection that you declined or was it an upgrade to a higher level of TurboTax?
The messages can be fairly close together sometimes in your tax return.
If you have to, go back to the beginning of the return and continue through the questions and solutions until you get to the question on audit protection so you can verify how you answered it for accuracy.