How to report a problem
Email hello@calculate.studio with the page URL, the inputs you used, the result you saw and the result you expected (and a source if you have one). Concrete reports like this let us reproduce and fix an issue quickly.
How we handle corrections
We treat calculation errors as high priority. When a report is confirmed, we correct the formula, its test and any affected worked examples together, and update the page's reviewed date. Where a figure was time-sensitive (such as a tax year), we either update it or label it clearly so no one is misled in the meantime.