Morgan, a sole practitioner CPA, prepares individual and corporate income tax returns. What documentation is Morgan required to retain concerning each return prepared?

A. An unrelated party compliance statement.
B. Taxpayer's name and identification number or a copy of the tax return.
C. Workpapers associated with the preparation of each tax return.
D. A power of attorney.

Answer: B. Taxpayer's name and identification number or a copy of the tax return.