If you are not yet registered to Business My Account, as part of the registration process you will need to send an access request to the Account Administrator.
If you are already part of business my account then as part of the Link process, you will need to send an access request to the Account Admisnitrator. Login to Business My Account and go to the “Manage My Account” tab. Select Link/Unlink Accounts and enter the account information. An email will be sent to the Account Administrator informing them that you would like access to the account.