Prime Minister Narendra Modi on Thursday told Parliament that the current architecture of goods and services tax (GST), including greater weighting to manufacturing states, was his brainchild, which he had suggested as chief minister of Gujarat to then finance minister Pranab Mukherjee, but eventually Arun Jaitley, the finance minister during his government’s previous term, included it into the law.

Replying to the discussion on the motion of thanks to the President’s address, the PM sought to defend the numerous amendments to GST, and said any reform of such magnitude ...