When invoicing clients, you can adjust your invoice to include any additional fees that may apply to the goods or services that you’re providing. This could include sales tax, shipping and handling, credit card payment fees, or anything else that you and your client have agreed to.
To add a fee to your invoice, follow these steps:
In your invoice, add at least one item and then click + Fee.
Enter a name and an optional description for the fee.
Choose if you want to apply a flat fee or a percentage-based fee.
Enter the fee amount, either as a dollar amount or a percentage.
Click Save to add your fee.
Repeat as necessary to add additional fees.
Keep in mind that when you receive payments for invoices, those payments will settle as a lump sum—meaning that you may need to account for any fees or taxes with separate bookkeeping entries.

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