## Zoho Invoice — Product, features, payments, integrations, solutions, and help Index Access the complete documentation index at: https://www.zoho.com/qa/invoice/llms.txt Use this file to discover all available documentation pages before proceeding. # Credits * [When do I need to use a credit note?](/qa/invoice/kb/credits/use-credit-note.html) * [How do I delete a credit note that has already been closed?](/qa/invoice/kb/credits/delete-credit-note.html) * [How do I issue a refund for returned goods?](/qa/invoice/kb/credits/refund-invoice-amount.html)