CII-SR-473

Explanation

Each allowance or charge (BG-20/BG-21, BG-27/BG-28) has exactly one amount. Several amounts on the same allowance make the totals check ambiguous.

How to fix

Give exactly one amount per allowance or charge; record several amounts as separate allowances or charges. (Typically a software-side issue, not user input — raise this with your invoicing software vendor; if you're receiving the invoice, ask the sender to address it with theirs.)