Customer invoices with a cancelled status

AI generated answer (using internal Slack threads):

In NetSuite, when an invoice is paid, it is marked as 'Paid In Full' and cannot be reopened without reopening the accounting period in which it was closed. This is to ensure the integrity of the financial data. If a refund is processed for a paid invoice, the invoice status remains 'Paid In Full' because one payment was retained. If you need to cancel a revenue plan or arrangement due to an invoice being voided, you can create a return authorization. This will create a negative revenue plan, and the two plans will cancel each other out. As for setting a sales order status to 'Cancelled' via a workflow, it seems that this might not be possible due to an error "Invalid orderstatus reference key C.". A script might be needed to achieve this. ****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ******