Is the tax feature something everyone needs/should use?

Is the tax feature only for certain users/businesses? or should even small volume hobbyists use it?

I use a UK drop-shipping company for fulfilment, so I have to pay VAT. I have included VAT in my marked-up store prices. I am shipping internationally. My own artwork prints, nothing that will be substantial.

The price will remain unchanged, whether i incorporate VAT to cover the costs, or remove it only to add it back on via the squarespace tax feature - but is there any reason/obligation why to do one instead of the other?

Thanks