Glad to have you join the Community. QuickBooks is a powerful program that's equipped with the tools that help you simplify your accounting. I'll be happy to steer you in the right direction.
In order to successfully upload your data into QuickBooks from an outside source, I checking out the following article as it shows you how to: Import Data into QuickBooks Online. You can also look into using third-party data migration apps that you can search for on our app store by visiting www.apps.com. I recommend choosing an app that suits your business needs based on the app description and the reviews.
Let me know if this info helps. I'll be one message away in case you have other questions. Otherwise, I wish you a great rest of the week.
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