Thanks for joining the Community and bringing this situation.
I want to make sure that you'd able to edit or create a template in QuickBooks Desktop for Mac. This time,
I suggest contacting our Customer Care Support Team. They have the expertise and necessary tools to help you determine what caused the issue.
To contact us, follow these steps:
Upon contacting support, please make sure to select the correct prompt. This is to ensure that you'll be routed to the support agent.
Please let me know how the call goes. I'm always here to further assist.