In my experience both Fedex and particularly UPS exploit customs situations to their advantage - whenever they are involved I have paid 90 % handling/brokerage fees to Fedex/UPS and 10% or less of the fee is actually in tax. (Yes a I have paid bills for over $100 for $5 in excise tax)
However, for a repair you should not pay ANY taxes.
However, for a repair you should not pay ANY taxes.