I just want to make sure you are calling the correct entity. If you have questions regarding DSP registrations or taxes, you should be calling the NRC, National Revenue Center for the TTB, at 877-882-3277. I do not like their new phone system which send you, automatically, to voicemail after 15 minutes of holding, else wise, I feel the people working at the call center are helpful or will get you to someone who is helpful.