Amend an incorrectly posted sales order or invoice

Once an Sales Order and/or Invoice has been posted to the Ledger (from the batch to the live account), then no changes can be made; this cannot be amended.
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In this situation, to resolve this, you would have to reverse the incorrectly posted transaction.
An appropriate Credit Note would need to be posted in the correct manner in accordance with the Sales Order/Invoice, in order to reverse and cancel it all out.
​Note: If reversing the order, ensure to use the same stock code(s) to ensure the stock(s) get put back into the stock record(s).
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If this is against a Sales Order, the Credit Note would need to be raised via the SOP Module (The SOP / Selling ledger tab).
In this way, the Credit Note will do the same kind of thing that a Sales Order would. It would generate the Credit Note for the Order, and also for it's invoice.
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This would then need to be allocated together to cancel them out.
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Once this is done, the Sales Order would need to be re-posted correctly as required.