A different response now...... Of course, they mistakenly refer to it as General Sales Tax instead of Goods and Services Tax.
Please accept our apologies for the failure of the previous email to
appropriately address your inquiry. If your credit card is billed to a
United States billing address or you are a citizen of the United
States,
you can apply for a refund of the Canadian General Sales Tax directly
through Hotwire. Please reply to confirm that you meet one of the above
qualifications and we will begin the process immediately.
If we can be of further assistance, please feel free to reply to this
email or contact us directly at 1-866-HOTWIRE (468-9473). Thank you for
visiting Hotwire.
Sincerely,