The 2018 Federal Tax Rate Schedules (Form 1040 ES) calculator estimates the taxes you will pay for 2018. We are not accountants or tax advisers and we recommend that you perform your own calculations using the IRS worksheets or consult your accountant and do not rely solely on this calculator.
INSTRUCTIONS: Enter your information for each variable.
2018 estimated tax form: https://www.irs.gov/pub/irs-pdf/f1040es.pdf