TIN stands for Taxpayer Identification Number and which is an employer identification number assigned by the Internal Revenue Service (IRS) when registering a company to do business.

TAN stands for Tax Deduction Account Number and Collection Account Number which is a 10 digit alpha numeric number required to be obtained by all persons who are responsible for deducting or collecting tax. It is compulsory to quote TAN in TDS/TCS return (including any e-TDS/TCS return), any TDS/TCS payment challan and TDS/TCS certificates

Tangent ofany angle, sn