For the first option, is there a place on the pre-payment page where I can explain why their address is necessary?
For the second option, can I set it up so that the buyer still only pays $23, but the taxes are subtracted from that? (Meaning, I pay the tax from whatever profit is made, instead of having it tacked on for Canadian buyers to pay on top of the $23.) If so, is the tax calculated before or after PayPal fees?