If I want to bring in historic transactions, what report should i download from Amazon to align with Amazon Seller Connector App

I appreciate you for getting in touch, @counterplace. Let me share some insights about downloading reports with historical transactions from Amazon, which you can then sync with your Amazon Seller Connector App.

Since Amazon is a third-party application, it's advisable to contact their Amazon Customer Support team to ensure the best guidance on what report to pull up to align transactions using the Amazon Seller Connector App.

Additionally, to learn more about importing data into QuickBooks Online, we have helpful resources that provide step-by-step instructions and videos. You can check out the following links: 

• Export reports, lists, and other data from QuickBooks Online
• Common questions about importing data to QuickBooks Online

If you have any further questions about data integration-related topics in QuickBooks Online, feel free to leave a comment below. I'll be happy to assist you further. Have a great day!

@counterplace-out 

You can try use a 3rd party connector as a workaround.