Right now I am in my 7th year of H - B with approved I - 140 ( EBB ) and I am going to apply for I - 485 as soon as it becomes current and expecting it will be current soon . Do I need a letter from the employer . If yes how the job description has to be mentioned . Is it how we filed during PERM job advertisement or with detailed description during my PERM ad in my company's website or it has to be mentioned as per my H - B job description . Why I am asking this question is because the H - b job description id different from PERM job description . I am just guessing that I need to get letter from employer as per PERM ad with detailed description mentioned in my company's website during the time of PERM filing . Am I right . Kindly clarifyIn the PERM newspaper advt job description was very brief whereas in the company's website the job description was given in detail. I just want to know whether I need to get the letter with detailed job description or just brief is enough ? I am very much aware of the job title and the salary. Please clarify.