As a single-member LLC, you’re not legally required to have an EIN unless you have employees, pay excise taxes, or meet any of the other conditions listed earlier in this article. You can use your SSN to file taxes for your business on your personal income tax report. Because a single-member LLC is a disregarded entity and taxed as a sole proprietorship, the sole owner of the LLC is not considered an employee and therefore does not need to file taxes for their business separately from their personal income.