| Ex. LAW-118 | GAO-26-107456, 'COVID-19 Relief: IRS Can Use Lessons Learned to Address and Prevent Improper Payments in Future Tax Programs' (February 10, 2026), GAO-26-107456, Highlights page; pp. 27, 30, 49 (PDF pp. 2, 32, 35, 54)GAO-26-107456, 'COVID-19 Relief: IRS Can Use Lessons Learned to Address and Prevent Improper Payments in Future Tax Programs' (February 10… | Internal Revenue Service | Legal authority | Feb. 10, 2026 | | Legal authority | Primary source read | |
| Ex. LAW-153 | GAO-26-107456, 'COVID-19 Relief: IRS Can Use Lessons Learned to Address and Prevent Improper Payments in Future Tax Programs' (February 10, 2026), GAO-26-107456, Highlights page; pp. 27, 30, 49 (PDF pp. 2, 32, 35, 54)GAO-26-107456, 'COVID-19 Relief: IRS Can Use Lessons Learned to Address and Prevent Improper Payments in Future Tax Programs' (February 10… | Internal Revenue Service | Legal authority | Feb. 10, 2026 | | Legal authority | Primary source read | |
| Ex. LAW-139 | Taxpayer Advocate Service FY2026 Objectives Report, Objective 6 (published February 11, 2026; updated May 29, 2026), taxpayeradvocate.irs.gov, Objective 6 status pageTaxpayer Advocate Service FY2026 Objectives Report, Objective 6 (published February 11, 2026; updated May 29, 2026)… | Internal Revenue Service | Legal authority | Feb. 11, 2026 | | Legal authority | Primary source read | |
| Ex. LAW-027 | ERC Today, LLC v. McInelly, No. 25-2642 (9th Cir. Mar. 17, 2026) (memorandum)ERC Today, LLC v. McInelly, No. 25-2642 (9th Cir. Mar. 17, 2026) (memorandum) | United States Court of Appeals for the Ninth Circuit | Legal authority | Mar. 17, 2026 | | Legal authority | Primary source read | |
| Ex. LAW-029 | Juggler Dave and Friends, LLC v. United States, No. 25-338 (Fed. Cl. Mar. 25, 2026)Juggler Dave and Friends, LLC v. United States, No. 25-338 (Fed. Cl. Mar. 25, 2026) | United States Court of Federal Claims | Legal authority | Mar. 25, 2026 | | Legal authority | Primary source read | |
| Ex. LAW-137 | National Taxpayer Advocate blog, April 27, 2026 (updated May 1, 2026): 'Protect Your Employee Retention Credit Claim: Use IRS's New Streamlined Process to Request an Extension', taxpayeradvocate.irs.gov NTA Blog (Wayback capture 20260519230327); IRS 'Understanding your CP320B notice' page (Page Last Reviewed or Updated: 23-Apr-2026)National Taxpayer Advocate blog, April 27, 2026 (updated May 1, 2026): 'Protect Your Employee Retention Credit Claim: Use IRS's New… | Internal Revenue Service | Legal authority | Apr. 27, 2026 | | Legal authority | Primary source read | |
| Ex. LAW-151 | IRS.gov 'If you receive Letter 106-C about the Employee Retention Credit', irs.gov/coronavirus/if-you-receive-letter-106-c-about-the-employee-retention-credit, Page Last Reviewed or Updated: 27-Apr-2026 (saved September 27, 2026 as LAW-151)IRS.gov 'If you receive Letter 106-C about the Employee Retention Credit'… | Internal Revenue Service | Legal authority | Apr. 27, 2026 | | Legal authority | Primary source read | |
| Ex. LAW-080 | Northeast Health Services, LLC v. United States, No. 24-2096T (Fed. Cl. May 28, 2026) (for publication)Northeast Health Services, LLC v. United States, No. 24-2096T (Fed. Cl. May 28, 2026) (for publication) | United States Court of Federal Claims | Legal authority | May 28, 2026 | | Legal authority | Primary source read | |
| Ex. LAW-074 | First Source Employee Management, Inc. v. United States, No. 1:24-cv-02209-CEF, Doc. 19 (N.D. Ohio June 11, 2026)First Source Employee Management, Inc. v. United States, No. 1:24-cv-02209-CEF, Doc. 19 (N.D. Ohio June 11, 2026) | United States District Court, N.D. Ohio | Legal authority | June 11, 2026 | | Legal authority | Primary source read | |
| Ex. LAW-084 | Plastic Film, LLC v. United States, No. 5:25-cv-30-DCB-LGI, Doc. 45 (S.D. Miss. June 22, 2026)Plastic Film, LLC v. United States, No. 5:25-cv-30-DCB-LGI, Doc. 45 (S.D. Miss. June 22, 2026) | United States District Court, S.D. Miss. | Legal authority | June 22, 2026 | | Legal authority | Primary source read | |
| Ex. LAW-028 | Sundancer Pools, Inc. v. United States, No. 25-1291T (Fed. Cl. June 23, 2026)Sundancer Pools, Inc. v. United States, No. 25-1291T (Fed. Cl. June 23, 2026) | United States Court of Federal Claims | Legal authority | June 23, 2026 | | Legal authority | Primary source read | |
| Ex. LAW-031 | Tapestry Senior Housing Management, LLC v. United States, No. 25-cv-3419, ECF No. 29 (D. Minn. June 25, 2026)Tapestry Senior Housing Management, LLC v. United States, No. 25-cv-3419, ECF No. 29 (D. Minn. June 25, 2026) | United States District Court, D. Minn. | Legal authority | June 25, 2026 | | Legal authority | Primary source read | |
| Ex. LAW-030 | Key Meetings, Inc. v. United States, No. 3:25-cv-06520-WHO, ECF No. 44 (N.D. Cal. June 26, 2026)Key Meetings, Inc. v. United States, No. 3:25-cv-06520-WHO, ECF No. 44 (N.D. Cal. June 26, 2026) | United States District Court, N.D. Cal. | Legal authority | June 26, 2026 | | Legal authority | Primary source read | |
| Ex. LAW-081 | Region IV Mental Health Services v. United States, No. 3:26-cv-12-RPC-JMV, Doc. 21 (N.D. Miss. July 1, 2026)Region IV Mental Health Services v. United States, No. 3:26-cv-12-RPC-JMV, Doc. 21 (N.D. Miss. July 1, 2026) | United States District Court, N.D. Miss. | Legal authority | July 1, 2026 | | Legal authority | Primary source read | |
| Ex. LAW-082 | South Delta Planning & Development District v. United States, No. 4:25-cv-197-JDM-RP, Doc. 30 (N.D. Miss. July 15, 2026)South Delta Planning & Development District v. United States, No. 4:25-cv-197-JDM-RP, Doc. 30 (N.D. Miss. July 15, 2026) | United States District Court, N.D. Miss. | Legal authority | July 15, 2026 | | Legal authority | Primary source read | |
| Ex. LAW-150 | IRS.gov 'Understanding Letter 105-C, Disallowance of the Employee Retention Credit', irs.gov/newsroom/understanding-letter-105-c-disallowance-of-the-employee-retention-credit; LAW-122 shows Page Last Reviewed or Updated: 27-Apr-2026; the live page saved September 27, 2026 as LAW-150 shows 21-Jul-2026IRS.gov 'Understanding Letter 105-C, Disallowance of the Employee Retention Credit'… | Internal Revenue Service | Legal authority | July 21, 2026 | | Legal authority | Primary source read | |
| Ex. LAW-025 | I Health and Life Insurance Services v. United States, No. 25-1315T (Fed. Cl. July 23, 2026)I Health and Life Insurance Services v. United States, No. 25-1315T (Fed. Cl. July 23, 2026) | United States Court of Federal Claims | Legal authority | July 23, 2026 | | Legal authority | Primary source read | |
| Ex. LAW-085 | Defendant's Opposed Motion to Stay Case, County of Barry v. United States, No. 1:25-cv-01099-RJJ-RSK, ECF No. 21 (W.D. Mich. Sept. 4, 2026)Defendant's Opposed Motion to Stay Case, County of Barry v. United States, No. 1:25-cv-01099-RJJ-RSK, ECF No. 21 (W.D. Mich. Sept. 4, 2026) | United States Department of Justice, Tax Division | Legal authority | Sept. 4, 2026 | | Legal authority | Primary source read | |
| Ex. LAW-006 | 26 U.S.C. 3134 (OLRC prelim text, laws in effect Sept. 25, 2026)26 U.S.C. 3134 (OLRC prelim text, laws in effect Sept. 25, 2026) | Office of the Law Revision Counsel | Legal authority | Sept. 26, 2026 | | Legal authority | Primary source read | |
| Ex. LAW-007 | CARES Act sec. 2301 as amended, note to 26 U.S.C. 3111 (OLRC)CARES Act sec. 2301 as amended, note to 26 U.S.C. 3111 (OLRC) | Office of the Law Revision Counsel | Legal authority | Sept. 26, 2026 | | Legal authority | Primary source read | |
| Ex. LAW-035 | 26 C.F.R. 1.6662-3 (eCFR current)26 C.F.R. 1.6662-3 (eCFR current) | Treasury; eCFR | Legal authority | Sept. 26, 2026 | | Legal authority | Primary source read | |
| Ex. LAW-036 | 26 C.F.R. 1.6662-4 (eCFR current)26 C.F.R. 1.6662-4 (eCFR current) | Treasury; eCFR | Legal authority | Sept. 26, 2026 | | Legal authority | Primary source read | |
| Ex. LAW-037 | 26 C.F.R. 601.601 (eCFR current)26 C.F.R. 601.601 (eCFR current) | Treasury; eCFR | Legal authority | Sept. 26, 2026 | | Legal authority | Primary source read | |
| Ex. LAW-038 | 26 U.S.C. 7454 (OLRC current)26 U.S.C. 7454 (OLRC current) | Office of the Law Revision Counsel | Legal authority | Sept. 26, 2026 | | Legal authority | Primary source read | |
| Ex. LAW-039 | 26 U.S.C. 6664 (OLRC current)26 U.S.C. 6664 (OLRC current) | Office of the Law Revision Counsel | Legal authority | Sept. 26, 2026 | | Legal authority | Primary source read | |