Enter your TIN in the appropriate box. The TIN provided must match the name given on line 1 to avoid backup withholding. For individuals, this is generally your social security number (SSN). However, for a resident alien, sole proprietor, or disregarded entity, see the instructions for Part I. For other entities, it is your employer identification number (EIN). If you do not have a number, see instructions "How to get a TIN."