Past arrears (dues/advances) can be uploaded by going to ‘Accounting->Set up->Upload Closing Balances’.
Please note that positive balance indicates advance payment and a negative balance indicates outstanding dues from the member.
When uploading, it is important that you create an accounting period prior to the current one, switch to that accounting period and upload.
To add a new accounting period, you can go to Accounting->Accounting Periods and click on “New Accounting Period” button present in that page.