How to manage limits on BaaS Asaas?

The root account must request a limit increase for white label subaccounts directly with the account manager.

Does my BaaS Asaas client need to send documents to Asaas? How does the process work?

Yes. Each and every Asaas account must go through the onboarding process to send documents. You can check how to do it here.

A BaaS Asaas sub-account does not have any access to Asaas. Everything is done through the system/application developed by the parent account.