Final answer:
Dr. Jones would use his Social Security number for tax purposes if no separate Tax Identification Number is obtained. NPI, state dental license, DEA numbers, or a 4-digit PIN are not appropriate for federal tax identification. The Social Security number is allowed by the IRS for sole proprietors without employees for business tax reporting.
Step-by-step explanation:
Dr. Jones, as a sole proprietor dentist with no employees, would most likely use his Social Security number for tax purposes if he has chosen not to obtain a separate Tax Identification Number (TIN). In the United States, sole proprietors can use their Social Security number when reporting taxes related to their business. This is because the IRS allows sole proprietors without employees and who do not file any excise or pension plan tax returns to use their Social Security number as their business tax identification number.
Options like the NPI number (National Provider Identifier), state dental license number, DEA number (Drug Enforcement Administration), and any special 4-digit PIN number are not suitable for tax submission purposes. The NPI is used in the healthcare industry to uniquely identify health care providers in standard transactions, the state dental license number is used for professional licensing, the DEA number is specific to prescribing controlled substances, and a 4-digit PIN number isn't relevant to federal tax identification.