i help friend bought before, didnt pay import tax, but bear in mind, it always depends on the shipping company, Fedex use to declare and custom will call you to pay tax and if possible try to avoid, thats my experience

Usually I buy from bestskinsever. You can try this as alternative

silkwrap naked series cutting nicer than bse, although i am using bse
the button and hole from silkwraps naked series is not just open like bse...
go for USPS i never get call from custom for shipment with USPS, only Fedex once and i never use again lol

if you want to try bestskinever try put your order in cart, few days they will email you with discount code i have done this few times for 6/6S and my iPhone 7