| Clue | Source | Date |
|---|---|---|
| It contains nearly 10,000 sections | New York Times | 03 Aug 2024 |
| Auditing guideline | New York Times | 04 Dec 2022 |
| CPA's study | Thomas Joseph | 07 Sep 2021 |
| Some reading for an I.R.S. auditor | New York Times | 17 May 2021 |
| Returns policy? | The Washington Post Sunday | 21 Feb 2021 |
| Regulations involving deductions | USA Today | 24 Jul 2020 |
| Accountant's study | Wall Street Journal | 11 May 2019 |
| Accountant's study | ||
| CPA's study | Thomas Joseph | 15 Apr 2015 |
| C.P.A.'s study |