Invoice Maker Silently Ignores Discount Values It Cannot Use

A tester on the OnePassApps team checked the Invoice Maker's discount field by entering 22 values across Percent and Amount modes on a sample invoice with a £3,703.68 subtotal. Twelve values were applied, while ten were dropped without any error message or warning. The refused values included those with more than two decimal places, percentages above 100 or below zero, and Amount values exceeding the subtotal. Each rejected entry left the invoice showing the same tax and total as if no discount had been entered. The rules governing these refusals are not documented on the page, so users can only detect them by comparing totals manually.