When the end of your A/P accounting period has been reached, it is time to 'close the books'. By this time, all charges have been posted, payments have been received and deposited, and manual adjustments have been made.
Once an accounting period is closed, any accounting data in the closed period becomes 'locked' and cannot be changed. If you realize that you mistakenly closed the accounting period prematurely, you can reverse the close and reopen the accounting period.
Reversing the closed period is a viable option if you immediately realized the mistake. However, keep in mind that ANY activity that was posted to the new period after the last period was closed will now be rolled back into the last period. This may or may not be what you want to happen. In other words, if period 10 was closed and period 11 was then opened, any charges, credits, or payments posted after that point will be in Period 11. Once you decide to reopen period 10, all the activity posted in Period 11 will be moved back to Period 10. The posting dates will remain the same but the Activity Dates will be adjusted to fit within the period 10 timeframe
To initiate a rollback, select ACCOUNTING from the main menu, then ACCOUNTS PAYABLE, then REOPEN LAST CLOSED A/P ACCOUNTING PERIOD