Do you know about Account Groups?

Account Groups

Account Groups are useful to list multiple accounts as sub-accounts of a bigger account and thus consolidate reports such as the Trial Balance.

To create a new Account Group, open the account you want to configure as sub-account, click on the Group drop-down selector, select Create and Edit…, fill out the form, and save. Next, set all the sub-accounts with the right Account Group.

To display your Trial Balance report with your Account Groups, go to Accounting ‣ Reporting ‣ Trial Balance, then open the Options menu and select Hierarchy and Subtotals.