Hi Yohany, 

I agree that this would be a fantastic feature so I will pass feedback on to the engineers to update this in the future. 

After doing some testing I have found if the invoice is open, QuickBooks will allow for you to edit the Customer name to become the Project, however if the invoice is paid (or has linked transactions) it will require for this to be removed before the customer details can be edited. 

Please reach back out if you have any other questions at all. 

Thanks, 

Rebecca