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We would rather be corrected than be confidently mistaken. Use this form to report a calculation error, suggest a tool, flag outdated guidance, or ask how one of our formulas works. Every message is read by a human — there is no ticket bot on the other end.
Report a calculation error
The fastest way to improve the site. Include your inputs and expected output — verified corrections update the tool, its example and its revision date.
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Tell us the calculation and who needs it. Widely useful tools that can be computed transparently get built first.
Content corrections
Outdated tax slab, changed statutory rate, or a guide that reads ambiguously? Point at the paragraph and we will fix it.
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