Foreign invasions definitely had an impact on the Indian society. The taxes during the reign
of the Delhi Sultanate and Mughal Empire increased compared to ancient and early medieval period.
During ancient and early medieval period the taxes ranged from 1/10 to 1/5 on the other hand the
tax rate during the Delhi Sultanate period was 30% - 50% and the non-muslims also had to pay the jizya Tax.
During the reign of Akbar the people had to pay 1/3 of the income. But I will give credit to Akbar that he
at least abolished the jizya tax.
Do not talk about taxes as our learned " historians" would tell us that increased commercial activity in mughal times nullified the impact and brought people in contact with rest of world.