Client - MTD Tax Liability Adjustments
A client's tax liability adjustments for a tax year under MTD Income Tax: what a carry-back loss claim is worth against the year's bill, and tax already refunded or set off. One HMRC resource per year, replaced in full on every save and cleared by a delete. HMRC support it from 2026-27 only, with no earlier equivalent, and accept a year only once it has ended; an earlier year is refused rather than answered empty. The carry-back claim itself is sent through the losses endpoints first.
