How do we update a client's address with the CRA when efiling their T1? The question "Do you want to change your address?" no longer appears right above the address in the info page.

That Question on the iNFO page was there in the past , but it was only used for Quebec taxpayers filing with MRQ. Because of that the question has been moved to the Quebec section of the INFO page, as it does not apply for CRA. 

If you want to change the address with CRA you just need to enter the address on the INFO page.

https://www.canada.ca/en/revenue-agency/services/tax/individuals/topics/about-your-tax-return/change...