What do I owe this quarter?
Ten questions, about five minutes. Your 2026 estimated payment, worked out on your device from the IRS's own rules — including the safe harbour, which caps what you have to pay.
Everything here is worked out on your device. Your answers are not sent to us, and nothing is saved unless you ask us to save it.
This is an estimate, not tax advice, and it is not a tax return. Your actual credit depends on your full situation.
Lopez Tax Service is not the IRS and is not endorsed by the IRS. This tool uses tax rules the IRS publishes as open source.