- Create a new income account in your Chart of Accounts specifically for recording tip income.
- Add a new product or service called "Tip" and link it to the newly created tip income account.
- Create and send your invoice to the customer as you normally would.
- Record the full payment amount received, including any tip.
- Manually calculate the tip amount by subtracting the original invoice total from the payment received.
- Edit the invoice to add a new line item for "Tip" and enter the calculated amount
