A Jacksonville Beach dentist who has practiced on 14th Avenue South since 1999 faces 16 federal charges after prosecutors allege he failed to report $3.4 million in business income and owes the IRS more than $1 million in unpaid taxes.

Jon Christopher Williams, who operates a holistic dentistry practice at 391 14th Ave. S., pleaded not guilty to all counts at his initial appearance Aug. 11, according to federal court records. A trial is tentatively set for Oct. 5, before U.S. District Judge Jordan E. Pratt.

The indictment, filed July 30, includes four counts of attempting to evade individual income taxes, 11 counts of failing to withhold and pay employment taxes and one count of obstructing the IRS, the U.S. Attorney's Office for the Middle District of Florida announced.

Each tax evasion and employment tax count carries up to five years in prison. The obstruction count carries up to three years.

What prosecutors allege about Williams' finances

Prosecutors allege Williams filed taxes normally through 2012, requested extensions for 2013 and 2014, then stopped filing personal or business returns entirely. Between 2020 and 2023, the government contends he earned approximately $3,371,657 from his practice but reported none of it, resulting in $1,079,136 in unpaid taxes.

Williams also used business funds to purchase a home and pay his children's private school tuition, prosecutors allege, according to News4Jax, citing the indictment.

How Williams responded to the IRS investigation

The IRS referred Williams' case to its criminal investigation unit in 2021. An agent served a summons at his dental office directing him to appear for an interview and bring business records.

Williams responded by emailing the agent that her actions were "causing me harm, injury and loss" and demanding she stop, according to the Florida Times-Union.

In May 2023, Williams sent an "affidavit of truth and claim of harm" to the agent, the U.S. secretary of state, the attorney general, the secretary of the treasury and the IRS commissioner, claiming the agent had improperly obtained his bank and credit card records. He also demanded $525,000 from the government to resolve the matter, according to the indictment.

Dentist's license remains active despite charges

Florida Department of Health records show Williams' dental license remains clear and active with no complaints on file. He has been licensed since 1986 and incorporated his Jacksonville Beach practice in 1999.