How does TurboTax know where to pay the return? I was not asked for a bank account number.

[TurboTaxSusan]

TurboTax doesn't pay your refund, the CRA does. 

If you don’t have direct deposit set up with the CRA, they will send you a cheque in the mail.

This CRA page tells you how to setup/change direct deposit: Direct deposit for individuals