Invoice numbers have suddenly started to add CRN in in front of them

Thank you for reaching out to us, w-r-thompson. I'd be happy to help you with removing your CRN from your Invoice Number.

To remove the CRN (Companies House Registration Number) from an invoice, we can manually delete or erase it before the Invoice Number. Once this is done, the system will remember the changes, and the CRN will no longer be added to future Invoice Numbers.

I'll also be including this additional resource that contains more information on changing your company name, contact info, or CRN in QuickBooks Online: Change your company name, contact info, or Companies House Registration Number (CRN) in QuickBooks Online.

If you ever need to change your company information or personal email address, please refer to this article: Change company name, address, email address, or CRN.

Please don't hesitate to reach out to this thread if you have any further questions or concerns regarding invoices or any other QuickBooks-related matter. I'm always here to help. Stay safe!