You're welcome, @ravensthroat. 

Feel free to let us know how it goes, and we'll take it from there. We'll be here waiting for your response if you need further assistance or if you have additional questions about this.

Also, finding new ways to adapt to our customers’ needs is how QuickBooks gets even better. With your feedback, we could add this option to convert an existing customer to a job.

I’ll be sure to share your thoughts with our engineers. It's also best if you can send your request by submitting it straight to them. Just follow the steps provided by my colleague @PreciousB. 

Know that you can always drop by here if you need any help with QuickBooks for Mac. The Community will be happy to assist you further.