My wife and I flew from Toronto Pearson, Canada to Tampa Florida, USA in Nov.November 2015. We are British citizens, resident in Canada, with official Permanent Resident status. We completed a Visa waiver on line, using this websiteESTAs. We are flying again in April this year. Should
Should I be in possession of some paper-workpaperwork, or can I just mention our application from 2015 when we check in at Pearson?