The best way to reach us is by email: hello@fincalckit.com
What to include
If you're reporting a possible error in a calculator, it helps to mention which calculator, the inputs you used, and what result you expected. For general feedback or calculator ideas, just let us know what you're trying to figure out — that's exactly how new calculators get prioritized.
Response time
FinCalcKit is a small, independently run project, so replies may take a few days.