
Quoting
Beth3
Speaking as a senior human resources professional, if everyone who had a fake I.D. in college couldn't get a job, a whole lot of people would be unemployed. I can't speak for every employer but it's unlikely this one stupid mistake will bar you from employment in your chosen field. When the time comes and you're interviewing for a position with a financial institution and they say they're going to do a background check, tell the interviewer what they're going to find. It's much better that you inform the prospective employer and explain the circumstances than have them be surprised when the background check arrives.
In the meantime, keep your record clean and don't do anything else unlawful. Employers understand a stupid teenage mistake but a pattern of those, particularly as you enter your twenties, would definitely cause you problems obtaining employment. Good luck.