-- A.N.A. prints IVA on the policy face and the parser already read it, but
-- `ParsedPolicy` had no field for it, so the figure only ever reached a review
-- note and the confirmed Policy was written with `tax` null. This gives it a
-- column, matching the premium fields beside it.
--
-- GMX stays null: its certificate carries no premium at all, so there is no
-- tax on it to read either.
ALTER TABLE `policy_ocr_documents`
  ADD COLUMN `extractedTax` DECIMAL(12, 2) NULL;
