The ruling on forgetting the first and last tashahhud

Question:
What is required of me in my prayer if I am with an imam and I forget the first tashahhud, and another time I forget the last tashahhud, and I know that the last tashahhud is a pillar? What do I do?

Answer:
As for the first tashahhud, it is obligatory for you to perform the prostration for forgetfulness, but the imam bears it. The one who prays with the imam and forgets, the imam bears it, so that he does not have to perform the prostration for forgetfulness? As for the last question, which is leaving the last tashahhud, and it is a pillar, you can come back to it. You return after the taslim, you return to the prayer while you are sitting, and you perform the last tashahhud completely, then you say the taslim, and you prostrate for forgetfulness after that. Yes.