What will I owe

Put in what you earned and where it came from. You get the whole bill — federal, New York State, the city, and self-employment tax on the part of it you worked for — and, if you tell it what you have paid in, whether you are writing a cheque in April or getting one.

You

What you earned

Both of you together, before anything came out.
Schedule C, or an LLC or partnership whose work you actually do. This is what carries self-employment tax.
Net of everything, including depreciation. No self-employment tax on this.

What comes off

Mortgage interest, charity and state tax after the cap. Leave it empty to take the $32,200 standard deduction.

What you have already paid

Put in what you earned and the whole bill appears here — federal, New York, the city, and self-employment tax if any of it is yours.

An estimate, not tax advice, and not a substitute for a return. 2026 figures: federal rates, standard deduction, the qualified business income thresholds and the child tax credit from IRS Rev. Proc. 2025-32; the Social Security wage base of $184,500 from the Social Security Administration; New York State rates reflecting the cuts in Chapter 59 of the Laws of 2025; New York City rates from the Form IT-201 schedule; the New York standard deduction and $1,000 dependent exemption from Form IT-201.