My address on TT and CRA are correct. It changed Jul 2022. When I try to pay here, it asks if I want use same billing addy for pymt as listed here, and that is old addy

I recommend to have the address updated on all your accounts. But, it can be different than CRA if you have not updated the new address on the payment account. The billing address should be the one that you have set up with your payment account