Hi there. Thanks for reaching out to us here. QuickBooks allows you to export some of your data. You can do this on your account by clicking the Gear icon > Export data. I encourage you to check out this article that shows you how to: Export Data out of QuickBooks Online. In case the data you're looking to export isn't showing up as an export option, I suggest looking into using third-party apps on your browser. You can search for these apps on our site www.apps.com. I recommend choosing an app based on the app description and it reviews.
Let me know if this info helps. I'll be here in case you have other questions.