Unfortunately you can't place orders for other people under your own account. For example you can't order two kits and hand one over to a family member. To place an order for a friend or family member you, or they, will need to do this separately under their own email address and account.
Each test kit purchased is associated with your online account and this is where you will activate your test kit when you take your sample, and it's also where your results will be shared with you. For this reason, each individual taking a test should order this under their own account. They can share their account details with you directly if they consent to you seeing their results too.