Assalamu alaikum wa rahamathullahi wa barakathahu.Is it permissible for a working woman (widow) to offer qurbani in her daugher's name, who is major but not employed or married yet, during Bakrid festival.Allah Hafiz.

All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.

If what is meant from the question is the ruling on the sufficient sacrifice for the daughter and her mother, then the answer is that if the daughter resides with her mother in one house as it appears from the question, then one sacrifice is sufficient for both of them and even for everyone in the house who shares the expenses.

‘Ataa’ ibn Yasaar said: “I asked Abu Ayyoob al-Ansaari: ‘How did you use to offer the Uth-hiyyah (the sacrificial animal) at the time of the Prophet ?’ He said: ‘At the time of the Prophet a man would sacrifice a sheep on behalf of himself and the members of his household, and they would eat some of it and feed others from it. Then people started to boast about it, and it became as you see nowadays." [Ibn Maajah and at-Tirmithi who classified it as Saheeh (authentic)]

Allah Knows best.