The Trial Balance and Balance Sheet can go out of balance if a closed sale has unpaid commission(s), unbalanced transactions, or if a sale is not balanced in some months, meaning, there are dates in the sale that cross months. To find out which transactions are the cause of the problem, navigate to GL>>Processing>>Post the General Ledger.
Enter Ending Date = to current date.
Leave the All Dates through Ending Date box checked.
Leave all modules selected.
Click Show Exceptions.
If you have transactions that are out of balance, cross months, or have unpaid commissions in a closed sale, you will receive the following pop-up:
All Exceptions, appearing in the grid, will need to fixed before you will be able to post and before your Balance Sheet and Trial Balance will be in balance again.