Double Taxation Avoidance Agreements (DTAAs) are agreements between countries to mitigate double taxation, where the same income is taxed by two countries. India has comprehensive DTAAs with 88 countries, specifying tax rates and jurisdiction for different types of income earned abroad. Sections 90 and 91 of India's Income Tax Act provide tax relief for income taxed abroad for countries with and without a DTAA with India. Many foreign investors in Indian stock markets operate through Mauritius due to its favorable tax treaty with India, which does not tax capital gains made on selling Indian company shares.