Go to the Company menu and click Advanced Service Administration.
In the QuickBooks Business Services login window, click Create.
Enter the login information for the new user.
You will see the message: To create an account and request access from
the company administrator, please click Sign Up.
Click Sign Up to send an e-mail to the e-mail address supplied when the
Merchant Service was created. You, as the QuickBooks Administrator, must
respond to this e-mail before the new user can be authorized to process
credit card payments.
After you have granted authorization, the new user will receive a separate
e-mail notification, at which time he or she can begin processing credit
What is the Merchant Service for QuickBooks?