Non rent and damage related Deposit deductions

[Quandra Adams]

(NC Landlord here) 

There are two lease violations in question:

#1- Smoking in the unit (prohibited on lease and addressed with tenant to no avail)

#2- In April, my tenant asked if she can add someone to her lease. I told her she could and she gave me a due date for when she'd have the money for the additional tenant. She never paid, the person had been there a week prior and she moved 2 people in for duration of her lease. Her lease stated that she would be fined for unauthorized/extended stay guest. Her lease was up yesterday and she has moved. 

I just want to know if I can use a portion of her deposit for the non-payment of unauthorized guests and the smoking violation.