Good day, joyce-lyn.
For me to provide the correct solution to your concern, can you tell me more about it? Are you trying to send a credit note?
I'll be keeping an eye for your response. Keep safe!
Thanks for getting back to me, Joyce-Lyn.
You have me to help you send a credit note. Let me guide you with these steps:
I've also added this article that has the lists of transactions that can keep attachments: Attachments in QuickBooks Online.
Feel free to get back to this thread if you need my help. Take care always.