AMERICAS GOT TALENT AUDITION?

Hey,

So my friend and I were thinking of signing up for Americas Got Talent
new season! Is it still possible to sign up? And if it is, do we send
in a video or do we literally just walk up on stage and perform our
talent? Is there a website or something that will tell us what city it
is? Thanks! Please answer all three questions because I desperately
need to know these!! Thanks so much!
Do you know when they will be releasing the city  state? Thanks!