Hi Mandy,

In QuickBooks Online once we turned on the VAT feature, there will be no option to turn this off.

As a workaround since your client isn’t VAT registered, we can help him to set the default tax rate selection to choose Out of Scope of Tax or No VAT for all their future transactions. 

Here’s how:

1. Click the Gear icon.
2. Click Accounts and Settings.
3. Click Advanced.
4. Go to Accounting.
5. Click the drop-down in Default tax rate selection and choose Out of Scope of Tax (or No VAT.)

The Out of Scope of Tax is used for none vat registered business. This means, if you use it then it will not show in any taxes reports in your account. 

Stay in touch, and have a great day!

Thanks Angelo.  Done.  Only issue I still have is that the invoices still reflect a "TAX" block at the bottom of the invoice.  Not a big issue, but annoying for a nitpicker :-).  Hope QBO has this on it's list of things to do.

Not being able to turn off vat is a big issue for online. It is possible that people do de-register.

Angelo's fix helped for the process of inputting invoices and quotes etc. But I agree Nutman, it is an issue    ,  hoping it will be resolved soon.

Not sure if you have resolved this issue, as it was posted a while ago. When you create an invoice, at the bottom, there is a button called customise - if you click this and choose current style, you can edit the contend to hide the VAT on the invoice.