Hi! There are actually several options you can use if Black takes the pawn. I'd highly recommend using the Game Explorer on this site. It'll tell you that Nf3 is the most common response among Master games, but playing e4, e3, and Nc3 are also acceptable moves.
The nice thing about Game Explorer is that you can go as deep as you want into an opening and learn why the popular moves are popular.
OK, I am kinda new to studying and i need to know what to do if my pawn gets taken when i am playing queens gambit:
If it gets declined it goes like this...
But if blacks play different like this...
I have been told that i need to know what to do if the pawn is taken but i don't!
I expect most of you know so...