Submitting prices to Google excluding VAT
By default, the Google feed will contain the prices of your products including VAT.
If the prices on your website are displayed excluding VAT (or are displaying including and excluding VAT but the more prominent price is excluding VAT) then you should be supplying prices for your products to Google Shopping, via the Google feed, excluding VAT.
This can be changed on the VAT settings page of your account.
Selet 'settings' from the left menu and then 'vat'.
Find the setting shown in the screenshot below.
Select 'excluding' from the options and click the 'save changes' button at the bottom of the page.