Carroll & Johnston, CPAs, LLC serves individuals, small businesses, and corporations from Columbia and Monroe, Louisiana. The firm focuses on tax planning and tax preparation, along with bookkeeping, payroll, accounting services, sales tax, new business formation, and IRS notice and audit help.

The team says it works to understand each client's business and build long-term relationships, with experience across oil and gas, consulting, and logging. It also notes use of QuickBooks, Accounting CS, and Ultra Tax CS in its practice.