The previous “Tele-TIN” phone number has been discontinued, and taxpayers who need an employer identification number (“EIN”) should now use the new business and specialty tax line at (800) 829-4933, or the new on-line EIN application at Hours for the new phone line are Monday – Friday, 7:00 a.m. to 10:00 p.m. local time. The On-Line EIN service is available 24 hours a day, 7 days a week.