Hi @susan p,

I'll handle this concern for you about emailing reports in QuickBooks Online (QBO).

Both the To and CC boxes on the Email Report page can handle 100 characters, at most. If your total recipients are more than that, you can either download the PDF version of the report or export it to Excel and send it via your email provider. 

Additional details of this process are in this article: Run reports in QuickBooks Online. 

If there's anything else I can help you with your QBO company, let me know in the comments below. I'll answer them for you.