Tenant left with past due rent

[Denver J Lobo]

I have a tenant in Atlanta, GA that left the unit without paying $6,600 in back pay rent. I still have their rent deposit. They are still in state but have not told me their new address. How do I file a small claims lawsuit against them without their new address? Once the lawsuit is filed, how long does the lawsuit stay on their credit reports? Any suggestions how you or other investors you know have handled this situation?