Can I change my CRP after I have paid for the TurboTax Service?

You can edit until you e-file your return - then it is locked.   What state?  If it is not required, you can skip it.   But if it is required, go back through the state interview, and you can edit your CRP.

I did already select to e-file, and paid. I am on the final step before submitting and it is asking for a "Managing Agent", and if there is not one applicable to leave it. I entered in the information on my CRP, but it is not accepting it. It asks me to fix it, which I have tried multiple times. It then brings me back to the screen asking if I want to fix my mistake. I am located in MN