The instructions (step 8) are at this link:
The username/password to access those instructions are at step 5.
Here are the complete steps to access the instructions.
- Sign in to Google Suite
- Advanced DNS Settings (note the username/password)
- Sign in to G Suite Domain Manager
- <mydomain.tld>| Gear | Domain Settings
- Transfer domain away from Google Suite.
That will lead to the instructions for transferring a domain out of G Suite.