Does severance delay my unemployment claim? after 18 years as an event coordinator

I was offered severance of 18 weeks after being let go as an event coordinator and I am unsure how it affects benefits. There are 18 people counting on me, so I am trying to be careful. The agreement mentions a release and a payment schedule. How did your state treat it?

Some states only count certain kinds of severance. A local workforce centre could tell me which.