About Gregg Katz
Gregg is a trusted, IRS‑authorized tax professional with over 30 years of experience preparing personal and small business income tax returns. Born in Kansas City, Missouri, Gregg was raised in Los Angeles, California before returning to Kansas City, where he attended Rockhurst High School.
After graduation, Gregg enlisted in the United States Marine Corps, where he was meritoriously promoted during basic training for leadership and performance. He was later stationed with the 3rd Battalion, 3rd Marines at Marine Corps Air Station Kaneohe Bay, Hawaii. During his first deployment aboard the USS Tarawa, Gregg’s unit participated in the Multi‑National Peacekeeping Force off the coast of Beirut, Lebanon, an experience that reinforced discipline, accountability, and attention to detail.
Following his military service, Gregg held a Top Secret security clearance and worked for the FBI in Hawaii for two years. His roles included National Crime Information Center (NCIC) Operator and Evidence Custodian, positions that required strict procedural compliance, accuracy, and absolute integrity—standards that continue to define his tax practice today.
Over the next two decades, Gregg built a successful and diverse business career. He served as General Manager of a Westport nightclub and later took ownership of a flower shop that gained national recognition. From 1998 to 2001, Gregg operated what was widely known as the world’s largest online florist, earning significant media coverage, multiple magazine profiles, and Official Missouri Senate Resolution No. 352 (March 15, 2001) Honoring Gregg Katz for Outstanding Small Business Achievement
Why the cat head logo? Gregg's great-grandfather (Isaac Katz) was one of the founders of the Katz Drug Company and the cat head was the store's logo.
Gregg has been preparing individual and small business tax returns since 1995 and maintains a spot‑free record, having never had a tax return corrected or audited by the IRS. His clients value accuracy, clear communication, and knowing their taxes are done right the first time.
Credentials, Authorization & Compliance
Gregg A. Katz, owner and principal of Gregg The Tax Guy, is an IRS-registered tax professional and authorized Electronic Return Originator (ERO) with an active IRS Electronic Filing Identification Number (EFIN).
As an authorized ERO, Gregg is approved to originate and electronically submit federal tax returns through the IRS e-file system. Every return is prepared and filed under his direct responsibility, with an emphasis on accuracy, compliance, proper handling of taxpayer information, and accountability throughout the filing process.
Gregg The Tax Guy provides clients with direct, personal service rather than handing returns off to a large office or rotating staff. From preparation through electronic filing, Gregg remains personally involved in each return he accepts.
Client privacy and data security are top priorities. Tax returns and supporting documents are handled in compliance with IRS data‑security standards, and client information is never sold, resold, or shared beyond what is legally required to file returns with the IRS or appropriate state taxing authorities.
When you work with "Gregg The Tax Guy", you work directly with Gregg A. Katz—a legitimate, vetted, and accountable tax professional, not a seasonal operation, outsourced service, or anonymous online preparer.
For clients, this means working with a fully vetted, experienced tax professional who meets IRS requirements, protects sensitive information, and stands behind his work.
Meet Gregg Katz of Gregg The Tax Guy - Voyage KC - May 18, 2026
