It's important that all your transactions be correctly entered so that your books can be well balanced. QuickBooks Online is a great tool able to connect to various services via apps in order to import information. I can provide some information about importing invoices.
QuickBooks Online itself does to connect to Google Drive directly, but it may be able to be connected through a third-party app. In order to view the third-party apps available to connect to QuickBooks, you can check out the Apps section in QuickBooks Online to search for apps that could suit the needs of your business.
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