This position is impossible because we see that white has doubled pawns on the f-file, and the g and h files already have their pawns. Therefore the pawn would come from the e-file. But the e-file already has a pawn, so that "e"-pawn would be a d pawn and would have to transfer to the e-file with a capture. However, this is why this position is impossible. Black has not lost any pawns or pieces yet, so white's d pawn couldn't transfer to the e-file with a capture since black has not made a capture yet.
Is the position possible?

I am sorry, I have been taking a break from chess for a while. Also, I don't know how to post a position.

It's all right, taking breaks is not a bad habbit. Can you tell me whether you are now back or not?
And to post a position you have to click on the 'Inster chess game or diagram' button that's on the top like shown in the below image, and then either make the position there or load it from FEN, URL, PGN or a file. Hope this helps.
Here are the rules.
If you think the position is possible, state the moves from the starting position.
If you think the position is impossible, tell why it is impossible.
---> No. 1:
The first person to correctly tell whether the position is possible or impossible while following the instructions wins a reward!
I will tell you the result within 5 days.
Submit your answer before March 9, 5:00 IST.