When you click Post to post an invoice, Purchase Orders compares the total of all details and taxes to the invoice total entered on the Invoice tab. The invoice is posted only if the two totals are the same.
Posting assigns the invoice number you entered, and completes the invoice and the receipt details for the selected vendor. You cannot change or delete an invoice after posting it, and you cannot change the receipt details for the vendor.
Effect on Inventory Control
If you changed the quantity received on an invoice, the quantity on hand in Inventory Control is adjusted during posting. Otherwise, invoice posting in Purchase Orders has no effect on Inventory Control data.
Effect on Project and Job Costing
Job-related invoices update Project and Job Costing quantities and costs only if the invoice differs from the posted receipt.
Keeping Information for Posted Transactions
If you use the Keep Transaction History option, you can display posted invoices in the Invoice Entry screen and print them on the Transaction List until you clear them from Purchase Orders. For more information, see P/O Transaction List Report Screen.
If you do not keep transaction history, posted invoices are deleted during posting or Day End Processing in Inventory Control (depending on when you cost inventory). For more information, see About Day End Processing.