About Ellis PENN Having Professional Tax Representation is a very powerful tool when you need to resolve your IRS problem. As you may have experienced, IRS agents can be very intimidating when they are making demands on you, the taxpayer. When you are represented by Ellis Penn you no longer will be subjected to their bullying, they tend to be less forceful and more reasonable when they must address themselves to a Licensed Representative, such as an Enrolled Agent (EA) Certified Public Accountant (CPA) or a Tax Attorney/Lawyer