Shipping from uk - removing tax when needed

[Phishtitz]

Hello

We have a store based in UK

When shipping to US, we need the tax to be automatically removed from the products at checkout. Is this possible?

We also need to remove tax from shipping in that case too. Is this possible, and should it be handled via the DHL app we're using?

We also ship to BFPO postal addresses and need to remove tax from products being sent to these. Is there a way to do this?

Thanks in advance