Contact
The fastest way to reach us is e-mail. We read everything; reports about incorrect results are read first.
What to write about
Bug reports, corrections and tool suggestions all go to the same address: kontakt@1001.tools. If a calculator gives a wrong number, please include the exact inputs you used — that usually turns a week of guessing into a five-minute fix.
Suggesting a new tool? Say what you tried to do and where the existing options failed you. The roadmap is prioritized by real use cases, and a concrete story beats a feature name.
What we cannot help with
The calculators here are informational. We cannot interpret your tax situation, review your contract or give financial advice — for those, a professional who can see your full picture is the only honest answer.