Tracey, I have exactly the same issue. There has been a thread open on this subject for some years, and QBO simply can't do it. They don't have any plans to ever be able to do it. For what is supposed to be accounting software, this is shocking. Having said that, there's plenty of other basic functionality that QBO can't do.
If you want to see Intuit's pathetic attempts at resolving this particular issue, then look here.
https://quickbooks.intuit.com/learn-support/en-uk/transactions/re-quickbooks-desktop-vs-online-can-i...
Sorry to be the bearer of bad news.
