On March 13, 2026, the Audit Committee and Board approved and ratified the engagement of CBIZ CPAs P.C. as independent registered public accounting firm to audit the fiscal year ending September 30, 2026 and to review the quarters ending March 31, 2026 and June 30, 2026. On March 17, 2026, the Audit Committee and Board terminated Bush & Associates CPA LLC as the company’s independent registered accounting firm. On March 26, 2026, Bush & Associates sent a letter to the SEC stating it agrees with Richtech Robotics’ Item 4.01 disclosures in the March 19, 2026 Form 8-K; this letter is filed as Exhibit 16.1. The report is signed by Chief Executive Officer Zhenwu (Wayne) Huang on March 30, 2026. The Bush & Associates letter’s closing line references “Crown Equity Holdings Inc.”