Property Code Sec. 92.104.  RETENTION OF SECURITY DEPOSIT;  ACCOUNTING.  (a)  Before returning a security deposit, the landlord may deduct from the deposit damages and charges for which the tenant is legally liable under the lease or as a result of breaching the lease. (b)  The landlord may not retain any portion of a security deposit to cover normal wear and tear. (c)  If the landlord retains all or part of a security deposit under this section, the landlord shall give to the tenant the balance of the security deposit, if any, together with a written description and itemized list of all deductions.  The landlord is not required to give the tenant a description and itemized list of deductions if: (1)  the tenant owes rent when he surrenders possession of the premises;  and (2)  there is no controversy concerning the amount of rent owed.

Property Code Sec. 92.109.  LIABILITY OF LANDLORD.  (a)  A landlord who in bad faith retains a security deposit in violation of this subchapter is liable for an amount equal to the sum of $100, three times the portion of the deposit wrongfully withheld, and the tenant's reasonable attorney's fees in a suit to recover the deposit. (b)  A landlord who in bad faith does not provide a written description and itemized list of damages and charges in violation of this subchapter: (1)  forfeits the right to withhold any portion of the security deposit or to bring suit against the tenant for damages to the premises;  and (2)  is liable for the tenant's reasonable attorney's fees in a suit to recover the deposit. (c)  In an action brought by a tenant under this subchapter, the landlord has the burden of proving that the retention of any portion of the security deposit was reasonable. (d)  A landlord who fails either to return a security deposit or to provide a written description and itemization of deductions on or before the 30th day after the date the tenant surrenders possession is presumed to have acted in bad faith.