How do I add interest to over due sales receipts

Hi there linda2627,

Welcome to the QuickBooks Community! Thank you for contacting us here. Being able to record invoices and interest charges is essential to ensure you receive payments for your services. I would be happy to provide some information about interest.

At this time, it's not possible to automatically add late fees to overdue invoices. However, QuickBooks allows you to manually record late payment charges. You can charge interest or late payment fees on overdue invoices. To get started, you’ll need to create an item for late fees. You can then add this as a line item to the existing invoice, or create a new invoice specifically for the interest. Here’s a helpful guide on how this can be done. If you need additional support, I recommend contacting the support team outside the community. They will be able to check your account details in a secure setting, as well as see your screen to better help you. You can reach them by following one of these methods:

Schedule a Callback or start a Chat: click (?)Help in the upper right > type and enter "Contact support" into the QB Assistant > click Contact Us > explain your situation > click Let's Talk > choose Get a callback or Start a Chat.
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If you have any other questions, feel free to reach out here.