I am a little confused on your question but I will try to answer it. If you buy a car with current emissions there good for a year from the test date. So say there is a month left on the current emissions you go down and title/tag you dont have to get another one for a year since there good for that long. The next required emissions would be the next time you renew your tag. Now if you had to get emissions I would wait a week or two after my birthday so next year I could get away with the old emissions, a two for one.