Was the game created as an unrated game with takebacks? If not, you can't.
how to take a move back?
Nevermind, I just looked at all your games and they are rated. Takebacks are only available in unrated games and you have to explicitly set them up.
You might be able to open a ticket to have the game moved back to a previous position but you probably don't have enough time to do that. Another option, if the move wasn't a pawn move, capture or castling, would be to just take turns moving to get back into the position you want, if that is possible.
hi how can I take back my move in 24 hours format if chess game? my opponent is ready for the same.