Transcripts can be requested through the school’s registrar’s office. You can often request your transcript online. Try visiting the college’s website and search for ‘registrar’s office’ or ‘transcript request.’ Some schools require written consent before processing your request and will not offer online services. In that case, try calling or visiting the office in person.
If your college no longer exists, you will have a more difficult time obtaining transcripts. Start with this information sheet: Guidelines for Obtaining Student Transcripts or Records from Private Institutions (pdf)