Exporting your data from QB Desktop to Online can be a lengthy process but don't worry, I'll be happy to help get you set up.
Depending on which version of QB Desktop you're using, you may be able to export the data right from your program and there are helpful articles which show you how to that. In case you're not able to do that yourself, there's no need to worry, our Data Services team will be more than happy to help. Here's a link to the form which will help you get in touch with our Data Services team.
I encourage you to check out these helpful articles which will guide you with migrating your data over:
Once you've checked out the articles above, I suggest reviewing these one as well:
In case you have other questions, feel free to contact our support team using this link here.