IRS (AND STATE) TAX PROBLEM SOLVING SERVICES - Special help for Taxpayers with Back Tax Returns and any IRS & State Tax Problems. IRS Enrolled Agent (EA) - Licensed to Practice Before the IRS. Experienced Tax Consulting and IRS Problem Solving Services. Back Taxes and Non-Filed Tax Returns. Offer in Compromise and Installment Agreement. IRS or State Audits and Letters. Tax Representation and Negotiations.