Double Taxation occurs when the same income is taxed twice, either in the same country or in two different countries.
Double Taxation typically happens in two situations:
To avoid this, countries sign agreements called Double Taxation Avoidance Agreements (DTAA).
Double taxation relief is provided under the Income Tax Act 1961 through DTAA provisions.
"An Indian resident earns income in the US and pays tax there, then is taxed again in India—this is double taxation (relief may apply under DTAA)."