PSAT dilemma

So, I found out I could graduate early( another story for another day) and I think I want to pursue that option.
I took the PSAT this year and I scored pretty high, but I marked on the paper that I was graduating in 4 years, so it’s not going to get me qualified for NM even if the cutoff is low enough.
If I take the PSAT junior year, would I still be eligible for national merit although I’ll probably be in college the following year? If not is it possible to get this years’ scores to count?