help with formula
 

Results in cell "A3".... If "B16" start date < 90 days, then "H4" vacation
days = "0", If "B16" start date is 90 but < 1 year then "H2" X Today() -
"B16", If "B16" = 1-5 years then 10 days, If "B16" = 6-10 years then 15 days,
If "B16" = 11+ years then 20 days. Here's what I have now but it lacks the <
90 days and the "H2" &" H4" part.
=IF(DATEDIF(B16,TODAY(),"Y")11,20,VLOOKUP(DATEDIF (B16,TODAY(),"Y"),K:L,2,0))