How to sort accounts in subaccount table.

Accounts must be sorted manually as there is no automated tool for this.
Use Insert Row and add the account where needed.

The default Intercompany table cannot be sorted the same way as others.
1.  Extract all data for the Intercompany accounts
2.  Deselect the Intercompany box for the affected entities
3.  Select the Intercompany box for the affected entities in the order you would like them, saving after each one
4.  Load the data back into the Intercompany accounts.