WHEN YOU FILL IN THE MULTIPASS (MARKED GREEN ABOVE) THE SYSTEM WILL ASK TO CONFIRM THE PAYMENT PLAN SELECTED. JUST PRESS "CONFIRM", YOU WILL HAVE 30 RISK FREE DAYS TO TEST IT.
WHEN EACH STEP IS COMPLETED YOU WILL SEE THE GREEN CHECK MARK.
To find the "Multipass token" of your Shopify shop, go to you account settings STEP 1 below and press Enable MultiPass (STEP 2 below)