To convert a Proforma Invoice into a Final Invoice in Moon Invoice, follow these steps:

1. Open the Moon Invoice application on your device or tap on this link.
2. Go to Sales > Proforma Invoice.
3. Select the Proforma Invoice you want to convert.
4. Tap More Options (three dots) and choose Convert to Invoice.
5. The Proforma Invoice will be converted to a Final Invoice, and its status will be updated to Invoiced.