what to do with sales order lines that have been fulfilled and invoiced, then returned from the invoice

AI generated answer (using internal Slack threads):

****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ****** When dealing with sales order lines that have been fulfilled and invoiced, then returned from the invoice, there are a few steps you can take: 1. Create a Credit Memo: You can create a credit memo off the invoice for the returned line item. This will allow you to refund the customer for the returned items. 2. Close the Sales Order Line: If the customer no longer wants the item and it was never shipped, you should close the sales order line to prevent it from showing up as partially fulfilled. This can be done by either editing the entire transaction and selecting 'Close' under 'Actions', or by closing individual lines using the 'Closed' column. 3. Handle Cash Sales: If a cash sale was accidentally created from a sales order, you can post a customer refund to cancel out the cash sale and then create a standalone invoice with the same items/amounts. This is especially applicable if the items are not inventory items, such as SaaS items. 4. Custom Logic/Code: You can also add custom logic or code to automate the refund process. This could involve creating custom fields on the sales order to enable the refund process, creating a client script to create refunds for lines marked for refund, and storing any errors that occur during the refund creation process. Remember, it's important to keep a trail of these transactions for future reference and auditing purposes.