Thank you for reaching out to us here on the Community page, @shaun12.
To give you the right amount of information may I know what are you trying to achieve and what part are you currently working? If you need help with using the QuickBooks Online application itself, you can visit our help articles and tutorials for your guide depending on the topic you need. Here are the following:
On the other hand, if you need help about using QuickBooks in the mobile app, feel free to read these links for your reference:
Leave a comment below if you have any other questions or if you're referring to something else. I'm a few clicks away to help. Have a good day!