Function answer_return_inputs 

pub fn answer_return_inputs(
    vault: &Path,
    pp: &Passphrase,
    year: i32,
    input: &mut impl BufRead,
    out: &mut impl Write,
) -> Result<(), CliError>

income answer --year N — ask every live question, then store.

Refuses on a year with no row: only income import creates one. Answering questions about a return that does not exist would materialize a near-empty blob, which then takes PRECEDENCE over the user’s tax-profile (the resolver ranks ReturnInputs first) — silently replacing a working profile with an empty return. A missing row is a mistake to report, not a shape to invent.