CEC Post ITA - Police records

Hello Everyone, I have uploaded all my documents with the exception of the police certificates, which as I understood can be requested when IRCC sends a letter/Instruction to do so.

I’m Mexican and currently living in Canada, but at the end of the document upload section should appear in the next section to pay and carry on?, I only see the exit questionary. Maybe I because I haven’t uploaded the police certificate, but then again, to do those I need an IRCC request letter.

Thanks for any advice.