McMullen Tax Services is a tax and accounting practice based in Palestine, Texas, serving East Texas clients as well as clients nationwide through remote service. The firm is led by John Wisener, an Enrolled Agent (EA), and works with individuals, families, churches, ministries, clergy, agricultural operations, and small businesses.

The practice provides tax preparation and IRS representation along with bookkeeping, payroll, sales tax support, new business formation, and QuickBooks setup. Its services cover individual and business tax filings, payroll tax compliance, monthly bookkeeping, IRS notices, audits, and planning for decisions that may affect taxes. Source materials also describe more than 40 years of experience helping clients file, plan, and resolve tax issues.