To get more information or to enroll in EFTPS, visit the EFTPS website at www.eftps.gov or call 1-800-555-4477 (24 hours a day, 7 days a week).If you make your payment using EFTPS, do not include the payment voucher.
DDA stands for demand deposit account. It is a bank account in  which you can deposit and withdraw money. A form of a demand  deposit account is a checking account.
DBA is an abbreviation for doing business as.. If you're a sole proprietorship, you need a DBA to register your business name. Corporations and LLCs need a DBA if they use a different name than what's filed with the state.