Tax exempt but paid CPP

I am 17 years old so am tax exempt but my employer took some CPP before I noticed. When I enter my T4 turbotax won't let me move on because I have tax exempt checked off but also have an amount entered in line 16 for the CPP payment they took. How do I get past that?

Troubleshooting

If you entered an amount in box 16, 16A, 17, or 17A, then you've already CPP. If you were supposed to be exempt, then you should talk to your employer, because it was taken off your paychecks when it should not have.