Question:

Last year I cut my hair on the 5th day of Dhul Hijja and then I came to know that we should not cut our hair if we intend to do Qurbānī. So was my qurbānī accepted or not?

Answer:

In the Name of Allah, the Most Gracious, the Most Merciful.
As-salāmu ‘alaykum wa-rahmatullāhi wa-barakātuh.
It is desirable for the one who will be sacrificing an animal for qurbānī to avoid cutting their hair or nails until after the animal is slaughtered. Rasulullah salallahu alayhi wasallam said:
“When the ten days (of Dhul Hijjah) begin and a person has an animal for sacrifice which he intends to slaughter, then let him not cut his hair or trim his nails.” (Muslim)
Rasulullah salallahu alayhi wasallam said in another Hadith: