The law in plain English
Return deadline
Under 68 Pa. Stat. Sections 250.511a to 250.512, the deposit response usually has to be sent within 30 days of the move-out timeline described by the state rule.
Required notice
Pennsylvania generally requires an itemized damage list and any remaining balance within 30 days after vacating, assuming the tenant supplied a forwarding address.
This dispute type
Once the Pennsylvania deadline passes, the dispute stops being only about the deductions and becomes a deadline-compliance problem too. A landlord may still argue damage existed, but 68 Pa. Stat. §§ 250.511a to 250.512 sets the clock for returning the balance and explaining any amount withheld.
Penalty leverage
If the withholding was wrongful or in bad faith, the exposure allowed under the statute is: Landlord forfeits the right to retain; you can recover double the amount due