Neither invoices or estimates are showing VAT I'm vat registered so it's important it did show it but now it's stopped

In QuickBooks Online (QBO), if the 20% standard VAT isn't showing when you create an invoice or estimate, the VAT settings may have been turned off, Timbo. I'll provide the steps to enable it again.

Here's how:

1. Go to Settings (gear icon) in the upper right corner.
2. Select Account and Settings.
3. Selec Advanced.
4. In the Accounting section, click the pencil icon.
5. In the Default tax rate selection, choose whether Inclusive of Tax or Exclusive of Tax.
6. Then, click Save and Done.
   
   

If you want to update your vat settings, you check this article: Set up and manage Vat in QuickBooks.

For future use, you can refer to this article if you want to adjust your VAT due: Create or delete a VAT adjustment in QuickBooks Online.

If you need further assitance managing your taxes in QBO, feel free to click the reply button. I'm always here to help.