How concerned should I be?

I’ve been selling on Amazon for about 4 months. During my first 6 weeks, I wasn’t as organized as I am now. I used a few temporary / one-time email addresses for orders to get use of deals and what not and not saving the login. I didn’t fully get how important organizing a paper trail would be.

Since then, I’ve tightened everything up and now properly track invoices, receipts, and documentation. My concern is more about early activity.

If I were to receive a Section 3 / documentation request in the future: • How far back does Amazon typically look? • How much weight do they put on early mistakes versus current practices? • What’s the realistic risk if documentation from the very beginning isn’t perfect, but everything afterward is solid? Does Amazon ask for %100 of every item sold under the asin or a chunk or what?

I’m trying to understand how concerned I should be and what proactive steps (if any) make sense today