Subtracting an amount (negative line item) from an invoice

If you prepend your Unit price amount with a minus sign, Harvest will automatically subtract that amount from your invoice total. To apply this negative line item to your invoice:

1. Head to Invoices > Overview and click the invoice you need to edit.
2. Click the Edit invoice button in the top left of the invoice.
3. Click the Add row button that appears at the bottom of your line item list.
4. Enter your description.
5. In the Unit price column, enter a minus sign (-) and the monetary amount you’d like to subtract from your total.
6. Update invoice. 

Adding a credit to an invoice

Harvest doesn’t have a credit note feature or a way to specifically track credit. The best way to issue a credit to your client is to deduct the credit from their next invoice. You can do that by editing your invoice to add a line item with a negative value.

Issuing a credit memo for an invoice your client has already paid
Harvest doesn't have a credit memo (credit note) feature, so there's no way to raise a formal credit document against an invoice that's already been paid. You have three options:

• Credit it on the next invoice — add a negative line item for the amount you're crediting, so it's deducted from what they owe next time.
• Refund the payment — issue the refund through the payment provider that took the payment (Stripe, PayPal or your card processor). Then record it in Harvest by editing or removing the payment on the original invoice.
• Raise the credit memo in your accounting system — if you use QuickBooks Online or Xero, create the credit memo there against the copied invoice. It won't sync back to Harvest.