My 2023 tax return did the same thing....I went into my intuit profile last year, updated email (says its verified), entered new email on desktop turbotax...went into form mode to make sure it showed correctly...called CRA to verify my email (no issues)...
Note - I have been transferring returns for 3-4 years and it is sending the NETfile confirmation to my old work email.
Something is definitely wrong.
