Based in New York, Doonan Tax Services is a year-round income tax firm that provides free consultations and assessments to prospective clients. As opposed to other tax-related businesses, Doonan Tax Services gives its clients a choice in regard to whether or not they would like to proceed with tax filing and processing following a free one-on-one consultation. Payment only occurs if the customer is satisfied with his or her tax results.

Additionally, the company will respond to letters or audits on its clients' behalf for no additional charge. The firm takes pride in serving hard-working, blue-collar Americans and routinely represents police officers, firefighters, nurses, and sanitation workers, among others. It specializes in helping those professionals receive the most from their returns, even without complete documentation of claims, as outlined in rule 4244.

Founded in 1981, the company was expanded upon and relaunched at a new location in the Bronx in 2016. It now includes partners Kenneth Doonan and Timothy Mitchell.