Form design
Testers found the field height too short and couldn’t find the primary action button to submit their information.

︎Increase field height
︎Include primary action button
Testers didn’t understand why they needed to sign in at the same time as entering billing information. They were also hesitant to enter their billing address and wanted an option for PayPal.

︎Tell users they’re going to register for a new account
︎Remove billing address
Testers were satisfied with the billing screen and took the correct action to fill out the form and move to the next screen.