Single? Married? Children? Deductions? (charitable contributions, 401K, IRA etc) Credits? Self -employed? Is this work income or capital gains? Any of it from tax free bonds? Oil or gas? etc etc etc.....
Here is a basic table of taxes on TAXABLE income:
https://www.irs.gov/pub/irs-pdf/i1040tt.pdf
Internal Revenue Service
TAX TABLE
