Hi LisaTran !
Welcome to Solo, it's great to have you on board!
Solo does not have a web browser version (although it is coming!), so should only be accessed through the app. The area you have accessed there is actually a web portal for accountants and bookkeepers to use to access and view their clients' Solo data. It's not designed to replace the app, so shouldn't be used to record data such as issue invoices, record income, expenses etc., as certain functions are not optimised or designed to do so.
So go ahead and jump into the app and double check your records there. You'll be able to update or edit anything that doesn't add up, and if you have any further questions about using the Solo app just holler and we'll come running!