QuickBooks Online (QBO) won't function without connecting it to the internet, and I recognised the convenience of using it offline.
Moreover, I'll also share this link where you can search for articles that can serve as your reference to guide you manage your QBO account: QuickBooks Online Help Articles.
Feel free to leave a reply if you have additional QuickBooks-related queries. The Community team always has your back. Have a good one.
QuickBooks Online is a cloud-based application, which means it relies on an active internet connection to access your financial data and utilize its features. Without internet connectivity, you won't be able to log in or perform tasks within the platform.