いっ ぽん だて税率 ぜいりつじゃなかったです
ippo nda tezeiritsujanakattadesu

Noun
Desu Copula

The polite, past negative form of 一本建税率

1. It wasn't a fixed rate.; It wasn't a standard rate.

Past/Perfective
Negative
Polite
Casual Register