I want an application that allows me to import sales from multiple platforms at one time: Shopify, Etsy, Faire and Amazon

It’s nice to see you in the Community, stacie11.

Let me help make sure you'll be able to bring your sales from multiple platforms to QuickBooks Online (QBO).

In addition to the information shared by @Fiat Lux – ASIA, you may want to use a third-party application. This way, all transactions from the programs mentioned above are imported to your company.

To find one, I recommend visiting the QuickBooks Apps Center. This is a place where you’ll find third-party applications that’s compatible with QBO. You can browse the customers’ reviews for a better comparison. From there, choose the one that meets your business needs.

For future reference, the following write-up contains resources that will guide you on how to handle your sales and other customer-related activities: Self-help articles.

Feel free to drop a comment below if you still have questions about importing sales transactions. I’m always ready to answer them for you. Wishing your business continued success.