Question: how to change date of birth with cra?
Answer: 1-800-959-8281 (English) or 1-800-959-7383 (Bilingual) ... 
Note: It is important that they specifically inform the CRA agent that their call is in connection with being a TFSA holder.
Confidentiality / legal representative. ... 
Date of Birth (DOB) ... 
Conflicting information.