Scammer pretending to be the CRA (Canada Revenue Agency) texted: "We have recalculated your fiscal activity and you are eligible for a tax refund. For more information: http://craarc.gc.is-certified.com/"

Whois search for the scammer's domain "is-certified.com" is here:
https://duckduckgo.com/?q=whois+%22is-certified.com%22

BTW, the 604-260 Vancouver, BC phone exchange has been assigned to Iristel Inc., so complain about 604-260-5067 to Iristel Inc.:
Iristel Inc.
675 Cochrane Drive, East Tower, 6th floor
Markham, ON L3R0B8, Canada
E-mail: [email protected]
Fax: +1 (416) 800-7931
Phone: +1 (416) 800-IRIS (4747)
Toll Free: +1 (866) 779-IRIS (4747)