Assuming you are self-employed and filing schedule C - http://www.irs.gov/pub/irs-pdf/f1040sc.pdf
Be sure that you write off all business related expenses. Assuming that $22,000 is your net income after deducting all expenses.
You will pay self-employment taxes 15.3% - $3366 - and fill th e schedule SE - http://www.irs.gov/pub/irs-pdf/f1040sse.pdf
You will file form 1040 - http://www.irs.gov/pub/irs-pdf/f1040.pdf and
Your income tax will depend on your other taxable income, filing status, dependents, deductions, etc - please specify.