Hi
As I understand from your explanation, you need your data in the row 3 changed based on the specific drop down list (which is the name of the taps), so when user select a specific tab name in that cell, then all your formula results updated based on that.
you can do this in many ways, the simplest way is set each cells of the row 3 equal to the drop down list cell and use $ to fix that cell (for example =$E$3)
and for the second (choosing a specified code number) is as simple as above.
However, if you need help for doing this, I will do it for you for free (if all you want is same as I said)