After QuickBooks Online accounts are imported into the Trial Balance screen, an adjustment is created for the imported balances. You can delete the adjustment if it is necessary to import for the same date range and avoid duplicating account balances in the Trial Balance screen.
If the application encounters any alerts and/or warnings during the mapping process, the Finish Import button is unavailable (greyed) until you resolve these items. You can hover your cursor over an alert or warning to view its description and modify the accounts in the grid to resolve any issues.