Thanks @SolarVaulter and @Pen_AGL . I am on monthly billing and that shows my end billing period as the end of the each calendar month (ie first bill ended 31 Dec 2025) - and does not show a billing quarter. Does the quarter end 28 Feb 26 (first 3 months after joining) or 31 Mar 26 (calendar quarter). I had done my calculations based on ending in Feb, but only received the first card in Apr so am hoping it isnt Mar as would have exported an extra month in the first period!