A proforma invoice looks like a normal invoice but has a different purpose: it commits nothing and settles nothing. It gives the buyer a clear, itemised statement of what a purchase would cost so they can approve a budget, arrange funds, or clear an import or procurement step before anything is delivered.
Because it is not a completed sale, a proforma invoice does not go into your books as revenue and does not carry a formal invoice number in your accounting sequence. Once the buyer confirms, you issue a proper tax invoice, and that is the document that records the sale and any VAT.
The practical rule: use a proforma (or estimate) to agree the deal, and a tax invoice to collect and record it. KAZI supports estimate-style documents that convert cleanly into a final, payable invoice.