Where are calculations performed?
In your browser. Exchange rate and price requests do not contain the amounts you enter.
Why separate country, language and currency?
Language controls reading and number input. Country selects relevant business data. Display currency supplies a unit for general simulations.
Is tax data up to date?
Not necessarily. Inherited configurations remain explicitly historical. The source register lists reference periods and checks actually performed.
Why did my result disappear?
An empty field, malformed number, exceeded limit or unavailable source prevents calculation. Correct the indicated field or retry loading.