Hi Charles,

Thanks for using our Product Support Community.

When you update an invoice to the ledger, the following happens: 

• The sales invoice (SI) transaction/s for the invoice post to the nominal ledger.
• For a product invoices the stock levels adjust. However, if the product invoice was created from a sales order, the stock levels adjust when the sales order was despatched.

Therefore, to reverse this you need to delete the SI from your data. You can do this in Transactions > highlight the relevant SI > Delete > Delete > Yes to confirm.

If the invoice was a product invoice you must then adjust the products back into stock. You can do this in Products and services > Adjustment in > drop in the relevant Product Code > enter the relevant Date and Quantity > Save.

You can then delete the invoice from the Invoices and credits list and re-enter it.

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