taken from ga clean air force:
What if I am registering my vehicle early?
GCAF recommends the vehicle be tested four to six weeks prior to the registration renewal date, however the vehicle may be tested earlier if needed. A Georgia Vehicle Emission Inspection Report (VIR) is valid for 12 months or one registration renewal, by the same owner. GCAF recommends contacting your tag office to determine if they will allow a registration renewal prior to the normal renewal period (more than 60 days prior to the motorist's registration renewal date).