Knowing whether you have a lien can be done in two distinct ways. You can choose to search for your lien records online by providing information on a search database which may include the name, location, date(s) of sale etc. Sites like Knowx.com and LexisNexis.com provide comprehensive database search for tax liens. Westlaw.com can be used for corporate tax lien searches. Just make sure to practice changing the spelling and other filter information just to check extensively the system. The other alternative is to immediately contact the IRS from 7am-10pm through their hotline number Toll Free, 1-800-829-(1040-individuals; 4933-business; 5500-government entities and exempt organizations).