Hi there, VAZ.
My main goal is to ensure your VAT record is accurate. I'm here to share insights about this matter.
QuickBooks Online (QBO) is dependent on the data you downloaded from Link My Books (LMB). The program will automatically add the Amazon entries, break down all sales and fees, check tax jurisdiction for each transaction, and apply the correct tax rates chosen during setup.
When you roll back and re-send the 12 settlements to QBO, the changes will affect the VAT amount if there are transactions that have VAT rates applied.
You can check out this link to help you determine what specific plan to select and its cost: Connect Link My Books.
Additionally, I've added an article to help you electronically submit your VAT return to HMRC: Submit a VAT return to HMRC using MTD in QBO.
The thread is always open if you need additional assistance managing VAT. My team and I are ready to assist you.