I have updated a sales order (attached a billing schedule). How do I update the sales invoice that was already billed ?

AI generated answer (using internal Slack threads):

To update a sales invoice that was already billed after updating a sales order (attached a billing schedule), you would need to follow these steps: 1. Export the Sales Order (SO) lines from a saved search. 2. Import the SO lines with the correct billing schedule. Make sure the billing schedule already exists before importing. If you need to update the billing schedule on an existing SO, you can try the following: 1. Edit the SO and select a different billing schedule. 2. Save the SO. 3. Edit the SO again and select the correct billing schedule. 4. Save the SO again. Please note that NetSuite doesn't automatically update the billing schedules used on transactions. If you're using custom billing schedules with multiple lines, it's recommended to use a percentage (%) instead of a fixed dollar ($) amount for more flexibility. To transform a sales order to an invoice that has a billing schedule and set a bill date that is not within the billing schedule, you can invoice an existing sales order in the UI and pay attention to the URL on the invoice. The query parameters on the URL are defaultValues you need to set while calling record.transform. ****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ******