You can easily duplicate an invoice into an estimate in Moon Invoice by following the steps below.

1. Open the Moon Invoice application on your device or tap on this link.
2. From the main menu on your left, go to Sales ➜ Invoices.
3. Click on the Invoice you want to duplicate.
4. On the right-hand side, click the three-dot icon (⋮) and select Duplicate, then choose As Estimate.
5. A dialog box will appear asking if you’d like to copy the Terms & Conditions and Notes. Select the options that best meet your needs.
6. Navigate to Sales ➜ Estimates - you’ll find the duplicated estimate listed there.