Why can I not edit an invoice after sending it?

Because your client may already have claimed input VAT off it. Issue a credit note instead — that reverses the original and leaves both records on file.

An issued invoice is a document that exists in someone else's records too. Quietly changing it is exactly what SARS looks for in an audit.

The correct treatment is a credit note. Open the invoice, press Issue credit note, and give a reason. The original is reversed in full, both documents stay on file with their own numbers, and you then raise a fresh invoice with the right detail.

Drafts are different. Nothing is locked until you press Issue and send, so edit a draft as much as you like.

• How does invoice numbering work?
• Can I send a quote first?
• I bill the same client the same thing every month
• Where do I put my bank details?

If not, the assistant in the corner can dig further, or a person will pick it up by email — Mon to Fri, 08:00 to 17:00 SAST.