Is it permissible to enter into a state of Ihram for Umrah on behalf of the deceased after the major release from Ihram for Hajj on behalf of the deceased during the Days of Tashreeq?

A Muslim who has performed the obligatory Hajj for himself is permitted to perform Hajj on behalf of another (deceased or incapacitated person). Therefore, it is permissible to perform Hajj on behalf of one's grandmother. It is also permissible to perform Umrah on behalf of one's father during the days of Tashreeq, provided that one has completed the rituals of Hajj, meaning that one has thrown the remaining pebbles and spent the night in Mina. It is a condition that you have performed the Umrah of Islam for yourself. However, it is not permissible to do so before completing the rituals (of Hajj).