To get immediate access to your CRA My Account, you will have to use Document Verification Service on the CRA Website.

1. Sign-In Partner or CRA user ID and password
2. Sign into your CRA My Account 
3. After signing in Click Profile on Menu
4. Find Review Authorized Representative(s) on Profile
5. Add a New Authorized Representative
6. Add Business Number (BN) 731599361
7. Confirm the Representative information is correct and click Next
8. Set the Authorization level to Level 2
9. Online Access select Yes
10. Select Does not expire and click Next
11. Review all information.