The cockpit reads TallyPrime over its own XML interface. Nothing is copied anywhere; the books stay on this machine.
In TallyPrime: press F1, then Settings, then Connectivity, and set “TallyPrime acts as” to Both. Leave Tally open on the company you want to read.
Kept on this machine only. The page never receives it, and it is sent nowhere except to Anthropic when you ask a question.