Question

where did the sultan increased the land tax in Delhi ​

Answer 1

Answer:

The Muslim Sultans of Delhi who preceded Alauddin do not seem to have demanded more than one-third of the produce in tax either. However, Alauddin imposed a 50% kharaj (Islamic tax on agricultural land) in a substantial part of northern India.

Answer 2

Answer:

The Delhi Sultanate ruler Alauddin Khalji (r. 1296-1316) implemented a series of major fiscal, land and agrarian reforms in northern India. He re-designated large areas of land as crown territory by confiscating private properties and by annulling land grants.