Okay, I have made a dynamic hyperlink based on 

HYPERLINK("#"&ADDRESS(S16,S15+2),"Click here to go to 'last case' cell"))
with S15 = 
=(SUMPRODUCT((O14:O70=O5)*(COLUMN(O14:O70))))
and s16 = 
=SUMPRODUCT((O14:O70=O5)*(ROW(O14:O70)))
Now, the thing is I am trying to make a textbox copy its value to the dynamically referenced cell (according to the lookup cell of O5)

This is basically person selectes a month (in the lookup cell) which reutrns that month "cell address" in a reference table. the text box would enable the person to enter in information that would go adjactive to the referenced cell 9in the table)

Any ideas?