Damage higher than security deposit

[Avi Garg]

One of my inherited tenants left after 5 years in the unit in Lakewood, OH. I have no idea of the unit condition when they moved in. The turnover is close to $10k with some upgrades. I have a few questions regarding charging the tenants:

1. I know I have to return the deposit within 30 days. The repairs have not started yet. Can I withhold the deposit and give them an itemized estimate repair cost? Or do I need to return the deposit since the repair has not been completed yet and then charge them after?

2. What are the repairs I can charge the tenants? I know I can charge them for the broken items. What about paint and carpet? These are 2 big ticket items worth $5k. 

Any help is appreciated.