You'll need to "register" for your CRA My Account. Follow the link below, scroll down to "Option 2" and click "Register". 

https://www.canada.ca/en/revenue-agency/services/e-services/e-services-individuals/account-individua...

I am registered. The issue seems to be that when I want to proceed to pay through my bank to CRA, it wants an account number. I cannot find any account number anywhere on CRA site under my profile? 

Why does it say CRA cannot accept the file I transferred?!

Please contact CRA for assistance with this matter as they'll be able to assist you further.

How do I contact the Canada Revenue Agency (CRA)?

What is my CRA Account Number ?

TurboTax doesn't have access to your private CRA account information.

Please contact CRA to retrieve your account: 1-800-959-8281

I hope this was helpful

I have a CRA account but cant find my account number