Hi there.

I recognize the importance of adjusting the settings for collecting Value-Added Tax (VAT) in QuickBooks Online (QBO). Let's work together to resolve this issue.

You can start by running the VAT Liability Report to review a summary of your taxable and non-taxable sales, along with the total sales tax collected from customers.

Here's how:

1. Sign in to your QuickBooks Online account.
2. Go to Reports, then search for VAT Liability Report.
3. Select the Customize the date period depending on how often you file your tax.
4. Click on the VAT Agency dropdown, then select All or just one VAT agency.
5. Once done, click on Run report.

Meanwhile when filing your VAT return, you can manually edit the Start date, End date, and Filing date as needed. Since in the VAT center, only the current year's VAT is displayed, and it cannot be adjusted for the next year. 

Additionally, you may find it useful to review this informative article on how to close out your previous fiscal year and prepare for the new one: Year-end guide for QuickBooks Online.

Please don't hesitate to reach out if you have any further concerns about managing your sales taxes and VAT in QBO. I'm just a message away and happy to assist.