Contact
For corrections, tool suggestions or questions, email us using the address below.
What to include
- Reporting a wrong result: the tool, the exact inputs you used, the answer you got, and what you expected. If you have a source (IRS publication, state revenue department form), include the link.
- Suggesting a tool: what you would use it for and how often. We pick new tools based on what people actually search for.
- Anything else: press, corrections, or partnership questions are all welcome at the same address.
Response time
This is a small independent site. Response times vary; a reply date is not guaranteed. Reports of incorrect calculations help us prioritize fixes.
Before you write
Many questions are already answered on the tool pages themselves — each calculator explains its formula and lists what it does and does not include. See also the about page for the data sources and limitations.