Welcome aboard to the QuickBooks Community, MrsDLRL.
It’s my priority that you can get all three of your issues taken care of.
In situations like this, we’ll have to gather sensitive information to pull up subscription details. Since we're unable to perform the process in the Community for the safety of your account, I suggest you contact our Technical Support Team.
Our phone support has tools to check license information and help trace why the product purchased is put into another account. After identifying the cause, they’ll assist in registering your QuickBooks for Mac 2016 and make sure the product is attached to your own account/company.
Meanwhile, you can also seek further assistance from our specialists on how to delete the old client from your account. To contact them, follow the steps below.
- In your browser, enter this link: https://help.quickbooks.intuit.com/en_US/contact.
- Go to the What can we help you with? section.
- In the Search for something else field, enter contact support.
- Click on the Search button.
- Click on the Get Phone Number to see the support number.
Since you just upgraded to the 2016 version, I’m also adding a link where you can download the Desktop for Mac Guide.
This information should help you get back to business in no time.
If you have any follow-up questions or other concerns, reach out to me. Please know I’m always happy to help. Wishing you continued success.