Thanks for getting back to us, systematicbookke.

I can help share some insights regarding Sub-customers or Projects features for your business within your QuickBooks Online account.

In Projects, there can only one hierarchical level which means it can't have sub-projects. Unlike customers wherein you can have a project or multiple projects. Also, Projects needs you to bill the project with the customer, whereas sub-customers can have a different billing address than the customer.

I've listed below the advantages of utilizing Project:

• There are three defined reports within Projects:
  > Project Profitability
  > Time cost by employee or vendor
  > Unbilled Time and Expenses
• You can view all projects in one place
• Drilling into the project gives you more information on the project
• Transaction processing is more efficient

Check out our detailed guide on changing sub-customers into projects.

Feel free to comment down below if you need anything else.