Tenant leaves before lease is up - can I keep the whole deposit?

[Erik Bowling]

I have a tenant on a one year lease that left after two months. She had issues with finances and could not pay rent. We gave her official notice to vacate in 3 days, which she did. That was on the 14th of the month. Can I keep the full security deposit for nonperformance of a lease? If not, can I keep 14 days worth? I emailed her and have yet to get a forwarding address for her to send her anything I might owe.