Hello talbig,
I can see how having the flexibility to work online and offline would be great for moments where you might not have access to the internet but would still like to work in your QuickBooks account. I'd like to elaborate on what's been mentioned here to ensure you have all the information needed with making a decision of how to approach this situation and your QuickBooks Online.
Since QuickBooks Online is a cloud software, it relies on the internet to be able to pull your stored data and use the features in the software. As has been mentioned, it can't be used while offline because of that.
Some solutions you can consider are to make note of whatever work you need to do in QuickBooks Online and then enter it later once you have access to the internet again. Another option, which Fiat Lux mentioned, is considering QuickBooks Desktop instead. This version of the program is installed directly on your computer, and while it does have some internet-based features, it can be used without an internet connection.
There are some things to consider with this version of the software, however, such as how each user would need to have the program installed on their workstation or using cloud hosting to access it if you're in different locations. I'll start you off with some articles and pages of information to see if this would be a good fit for you.
That should get you started, but don't hesitate if you have further questions about QuickBooks Desktop.
Should you have any interest in leaving feedback for QuickBooks Online, check out this article: How do I submit feedback? Taking the steps there forwards your comments to our product development team for consideration and is a great way to share your input about existing features and features you'd like to see. Here's a page where you can keep up with new features: QuickBooks Online Feature and Product Updates
Take care and have a great day!
