Can I write a excel cell reference based on a fixed column and variable row?

I already know the column is P, but the row number is based on count(I$2:I6)+1

Can I write anything to reference this cell?

>Solution :

You can use Index() for that. Ignore anyone who points you toward INDIRECT(). Avoid INDIRECT(). It is volatile.

=Index(P:P,count(I$2:I6)+1)