Race Through NY

Can someone explain to me how the Return Time ticket works for Race Through NY. I have it on my TP and it says I need to make sure I have a return time ticket that covers my 10:38am arrival. Does this work like the old FastPass system where I go there first thing in the morning and get a ticket to ride later?

Any insight is appreciated.

Do you have the Universal app? I think the easiest way is to get a return time on the app.

Thanks.

I just downloaded the app. So you just log onto the app when you arrive at the park and reserve a return time? How many people can you reserve for? We have 10 people in our group, do I have to link their tickets to my app somehow?