Nice to have you here in the Community space, @janegillett1.
We recently updated QuickBooks Online (QBO). The “Log Out” or “Sign Out” option is now located beside the Gear icon. See the image below for reference. 
To stay updated on the latest news and updates about QBO, check our QuickBooks Blog page regularly. Here, you get to know what our engineers are currently working on.
Need help with other tasks in your QBO account? Check out our QuickBooks Support page for guides and helpful information.
If you have other future concerns with your QBO account, please let me know. I’ll be around to help you. Have a good day.