can I apply credit memo to a grouped invoice

AI generated answer (using internal Slack threads):

Based on the conversations, it appears that a credit memo can be applied to open invoices in NetSuite. However, applying a credit memo to a fully paid invoice is not possible through standard functionality. An alternative way suggested is to delete the payment record, then edit the credit memo to apply the invoice. Furthermore, you can create standalone credit memos and use them against future invoices. There's nothing stopping you from posting an unapplied credit memo. As for applying a credit memo to a payment, it seems there is some confusion. A credit memo is a form of payment to the invoice. However, when creating a customer payment in the user interface, it is possible to apply it to an invoice and to a credit memo. It's not clear if it's possible to apply a credit memo to a payment once the payment was created, perhaps via a script. ****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ******