Hello there, @cindy125. I can assist you in resolving the problem you're having with QuickBooks Online.
Before we get started, could you tell me what error message you're getting? or take a screenshot and send it to us? This way, I'll be able to give you a precise solution to this issue.
Additionally, I've included these help articles if you need an immediate answer to your concern.
I'm hoping you'll come back to us. We're only a mouse click away.