Spotted a code that looks off, a calculator that gave a strange number, or a reference table that needs updating? This is the place to flag it.
We read every message that comes through this form, whether it is a specific code correction, a bug in one of the four calculators, or a general question about how a tool works. If you are reporting a possible error in a code or a formula, mention the page and the code or number involved; that is usually enough for us to track it down and fix it. We typically reply within one to two business days.
