VAT Relief for charities and individuals with chronical ilness or disabilities

Site URL: https://operabeds.com/cart

I am in the process of setting up a website and ecommerce site for a company in the UK healthcare industry. 

Some charities and private indivuduals are VAT exempt as long as they declare that at the point of sale (see axample screenshot from a Shopify site).

Shortly after advising the customer to use the Squarespace platfom (for reasons of Design, SEO and the fact that I am very familiar with it), they asked me to check if the platform could deal with VAT exemptions.

The support site says it can't be done and I also read on the forum that quite a few UK Squarespace site are currently struggling to adapt their site to shipping to the EU without VAT.

Is there a way around it with costom code? Does anyone know if squarespavce is working on this or do i need to look for another platform?

Hope you can help

Vincent