Do I add postage to a 2006 first class stamp?

Question

I have some old first class stamps from 2006, how much postage should I add to it?

Answer 1

The Statue of Liberty and Flag first class stamps of 2006 are 39 cents. Add 3 cents to make 42 cents.

The Flag on green background stamps are 41 cents. Add 1 cent to make 42 cents.