In order to be exempt from VAT, you need to complete a VAT exemption form and return it to Dexcom. You can request a form by ticking the VAT exempt box when registering your Dexcom Store Account, in your Dexcom Store Account Profile, or by contacting Customer Service on 0800 031 5761 or ukie.sales@dexcom.com. If that form has not been completed, any purchases made through the store will be charged VAT. Please review the government guidelines regarding VAT exemption.