Dates: From________ To________ Salary: Starting ________Final________ Supervisor. Below, we've laid out all of the questions on the application so that you know what to expect when you go to fill it out online.It is not illegal for an employer to ask you for your social security number (SSN). HOWEVER you are in no way obligated to provide your SSN. What is a Form I-20 and why do I need one? A Form I-20 is a government form which certifies that you are eligible for F-1 Student Status. Make your way at Burger King®. Find the right role for you, right in your neighborhood.