Question: what is the b notice?
Answer: A A “B” Notice is a backup withholding notice. There are two “B” Notices -- the First “B” Notice and the Second “B” Notice. You must send the First “B” Notice and a Form W-9 to a payee after you receive the first CP2100 or CP2100A Notice with respect to this account for soliciting a correct Name/TIN combination.