I am using this formula which is returning data as it should.

=IF(F19>58,"Please Reduce Pcs to 40ft qty",IF(F19>30, "40","20"))

However depending on the results it returns, specifically "20" or "40", I want to use a formula to get a cell to reference different cells. I have tried using this formula

=IF(F20=20, I55, I56)

The problem that I have is that even if cell F20 returns "20" my formula always references the false statement i.e. I56. Where am I going wrong?