Usually within 24 hours. I was once able to submit it within 5 hours, but that isn't usually the case. Once the show pops up in your Show Status page, you're pretty much able to apply the credit. HTH
I believe it expires in 6 months if that is your question. I submitted a catalog show for my new recruit and then went right on line and did her agreement (she gave me cash to pay for her kit) and all was good.
Well, right after I posted the question, my new team member went in and was able to submit her agreement - less than 24 hours after we'd closed her show!
I was told when I called that they have the 6 month's to use it and if they didn't they lose it but they can call and opt out before time is up and get merchandise if they so choose not to sign up after all. Plus they can sign up under anyone they want they do not have to sign up under you.