Odoo Point of Sale helps one to effectively track the cash flow happening within
the sales counter during a session/shift. Once a product is purchased or billed
in a POS session you need to validate it before closing the session. You should
post the entries in Journal items before closing the session. In Odoo POS while
you are closing the session a button is shown named ‘VALIDATE CLOSING & POSTING
ENTRIES’ for this function. You need to click this button before closing the session
& automatically post the entries into the journal.