I worked as an independent contractor as was sent a 1099-MISC form. The amount i earned is less than the $12,000 standard deduction but it still says I owe over $1000.

I worked as an independent contractor for a business.  This was the only work I did all year as I am a student.  The total listed on my 1099-MISC is less than $10,000 and was the only income I earned all year.  Why do I owe so much if the amount i earned is less than the standard deduction?  Thanks.