For Pre-Departure Tests:

You may all attend the testing center at the same time and will be allocated booths accordingly by the registration desk. 

Each family member will need to be registered in the booking system separately and you can pre-book your tests in advance by visiting Collinson Testing Centers USA

Children must be accompanied by an adult at all times. For more information please click here: Do children need to be accompanied by an adult?

For Pre-Return Tests:

Yes, the booking slots will allow up to 4 people in one session. So if you add the Supervised Antigen Self-Test with one booking time you can choose the quantity in the cart, you could get 4 test kits and all join in the same session. If you are ordering more than 4 test kits at the same time, you will have to place another order for up to 4 additional people at a new time.