Good day,@Robnewton.

Thank you for posting in the Community. Let me help you with how to close your books at the end of the month.

After setting up a date when to close your books you can review it by checking out our Year-end guide and checklist in QuickBooks Online. This way, you'll be ready for year-end.

You can also review this article for detailed steps in closing your books: Close your books in QuickBooks Online.

Please let me know if I can be of any additional help. Have a great rest of the week and stay safe!