Hi there, RBlazer.
Thank you for coming back to provide additional clarification about what interface you have right now on your screen. I also appreciate you for attaching a screenshot for visual reference.
Based on your screenshot, you can click the "Edit Other Name" as per the steps outlined above when changing the other names in QuickBooks Desktop for Mac.
For additional information, you can click this article: Add a customer, employee, or vendor in QuickBooks Desktop for Mac.
Please refer to this article to see steps on how you can add, edit, and track sales reps using the Mac version: Add a Sales Rep in QuickBooks Desktop for Mac.
Keep in touch if you need any more assistance with this, or there's something else I can do for you. I've got your back. Have a good day.
