How to post to a period that isn't the default period

Open the transaction record.
Click the Change the posting period icon (Ctrl + M) on the toolbar.
Double-click the accounting period to which you want to post the transaction.
Click Yes to the message, "You have chosen a period that isn’t the current default. Are you sure you want this period?"
Click File, Save.

NOTE:

The selected posting period remains open until closing the window.