Answered on December 29,2017
Tax Identification Number is the eleven digit unique code allotted to businesses, to track Value Added Tax transactions
Tax Deduction Account Number is ten digit distinct code mainly for simplifying collection and deduction of taxes at source.
It is issued by the Income Tax Department. Tax Identification Number is all numeric code while Tax Deduction Account Number is a alpha numeric code, the first four digits being numbers, the next five, alphabets and the last one is a number again.