السلام عليكم ورحمة الله وبركاته أحسن الله إليكم Ustadh you mentioned that the asl in case of forgetfulness it makes that which is there as if it is not there and does not do the opposite. Is this exclusive for forgetfulness or also the case for coercion and mistakes?

It is not exclusive to forgetfulness, coercion and mistake take the same ruling in what is prohibited, so there is no sin and the worship is not invalidated. As for what is commanded, none of the three puts the act in your account, the obligation remains upon you until you perform it.