Thanks for reaching out to the Community, @mjsteidley.
I recommend giving the User Full Access role so that they can access to add and edit additional contacts for clients. I've provided the steps below on how to do this with ease:
- Go to the Company menu, then Set Up Users and Password > Set up Users.
- Select Add User...
- Fill out the User Name, Password, and Confirm Password fields, then click Next.
- On the Access for user: (username) window, choose Full Access then press Next.
- Hit Finish.
That's all there's to it! You can refer to this Community Article for more information: QuickBooks Desktop Users and Restrictions.
If you need further assistance, please don't hesitate and reach back out to me. Have a great rest of your day.
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