The best way to bring any open invoice balances from a previous software system into your account would be to create a new invoice for a flat fee totaling that amount. You can then note that it is a "balance forward."
To do this:
Select the Create Invoice button on the Home page.
Select a Contact and Court Case. Leave Deposit Account and Payment Terms as is.
Add a Line item for a Flat Fee.
Add a Note, “Balance Forward.”
Add the amount of the Balance.
Click Save.
The invoice is created, added to the system and viewable in the Billing Invoices Tab.