Free tools

Calculators & quizzes

Five questions instead of an hour of searching: whether you are a resident, whether you need an FBAR, which entity to open, what the tax comes to. They run right in your browser.

Calculators

Resident or nonresident? (SPT)

Substantial Presence Test: Form 1040 vs 1040-NR, dual-status first year.

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IRS allowable expenses

Owe the IRS? How much you may spend and whether an Installment Agreement / OIC fits.

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Do you need to file FBAR?

Foreign-account check against the $10,000 threshold (FinCEN 114).

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Tax calculator

A quick estimate of your 2026 US federal tax.

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Self-employment tax

How much to set aside and pay via 1040-ES (15.3%).

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Ukraine CFC calculator

Whether a Ukrainian must report a US LLC as a CFC (КИК).

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Quizzes

Which filing status?

Single, MFJ, Head of Household — what's best for your situation.

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W-2 or 1099?

Employee vs contractor compared on taxes and take-home pay.

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Which company to open?

LLC, S-Corp or C-Corp — a quiz for your case.

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Kateryna Dzhevaga·IRS CAA · Authorized IRS e-file Provider·Federal practice (all 50 states)·EN · RU · UK