If you have unfiled tax returns, you have more options for help than most people realize. From federally licensed tax professionals to free community services, a range of qualified individuals and organizations can assist with preparing late returns, negotiating with the IRS, and resolving balances.

Knowing who does what – and when each type of professional makes sense – helps you make a well-informed choice.

Types of Professionals Who Help With Back Taxes

Three main categories of licensed tax professionals are authorized to represent taxpayers before the IRS. Each has different qualifications, areas of strength, and typical fee structures.

Enrolled Agents (EAs)

An enrolled agent is a federally licensed tax professional authorized by the US Treasury Department. The EA credential is the highest credential awarded by the IRS specifically for tax work. Enrolled agents must pass a comprehensive three-part exam covering individual taxation, business taxation, and representation before the IRS, and they must complete 72 hours of continuing education every three years.

Enrolled agents are often the most specialized professional for back tax situations. Many EAs focus specifically on IRS representation, prior-year filings, collection resolution, and non-filer cases. Because their entire scope of practice is tax-related, they tend to have deep familiarity with IRS procedures, transcript analysis, and resolution programs like installment agreements and Offers in Compromise.

Fees vary by complexity but enrolled agents are typically less expensive than CPAs or tax attorneys for comparable back-tax work. They are authorized to practice nationwide and can represent taxpayers before all levels of the IRS – examination, collection, and appeals.

Certified Public Accountants (CPAs)

A CPA is licensed by the state in which they practice and has passed the Uniform CPA Examination. CPAs have broad expertise in accounting, auditing, financial reporting, and taxation. For back tax work, a CPA with tax resolution experience can prepare prior-year returns, represent you before the IRS, and advise on payment options.

Not all CPAs specialize in IRS representation or back-tax situations. A CPA who primarily handles business accounting or financial audits may not have the same depth of experience with non-filer cases as one who focuses on tax resolution. When looking for CPA help with back taxes, ask specifically about their experience with prior-year filings and IRS collection cases.

CPAs typically charge higher hourly rates than enrolled agents, reflecting their broader accounting credentials. For taxpayers whose back-tax situation also involves complex business accounting issues – business closures, partnership disputes, multi-entity structures – a CPA may offer advantages that offset the higher cost.

Tax Attorneys

A tax attorney is a lawyer who has specialized in tax law, typically with an LLM (Master of Laws) in taxation or significant practice experience in tax matters. Tax attorneys are most appropriate for situations that involve or may involve legal proceedings: formal IRS appeals, Tax Court petitions, criminal tax investigations, complex Offers in Compromise, or large-scale business tax disputes.

Tax attorneys are generally the most expensive option. For a standard back-tax situation involving several years of unfiled returns and a manageable balance, a tax attorney is often more than is required. Their value is highest when legal strategy matters – not just preparation and filing.

If the IRS has indicated criminal investigation activity, or if your situation involves offshore assets, fraudulent returns, or potential legal liability, a tax attorney should be your first call.

Tax Resolution Firms

Tax resolution firms are companies – rather than individual practitioners – that specialize in IRS representation and back-tax resolution. These firms typically employ enrolled agents, CPAs, and tax attorneys as staff. They handle the full range of back-tax services under one roof: transcript review, prior-year return preparation, IRS negotiation, and resolution program enrollment.

Quality varies significantly among tax resolution firms. Well-established firms with licensed professionals on staff can provide effective help. Less reputable operations in this space sometimes promise guaranteed outcomes (which are not possible) or charge high fees without delivering results. Verifying credentials and checking reviews carefully is important when considering a firm.

CPA vs. Enrolled Agent vs. Tax Attorney: How to Compare

For most back-tax situations, the relevant comparison is between an enrolled agent and a CPA, with a tax attorney reserved for legal matters. Here is a practical framework:

• Simple back-tax filing (1-3 years, W-2 income, no enforcement action): Any of the three can help; an EA or tax-focused CPA is often the most cost-effective
• Complex multi-year filings with self-employment or investment income: EA or CPA with specific back-tax experience
• Active IRS enforcement (liens, levies, wage garnishment): EA or CPA with IRS representation experience, or a resolution firm with these credentials on staff
• Offer in Compromise or installment agreement negotiation: EA or tax resolution specialist
• IRS audit, formal appeals, or Tax Court: Tax attorney or EA with audit representation experience
• Criminal investigation or fraud concerns: Tax attorney – not an EA or CPA

When to Consider Professional Help

Not every back-tax situation requires professional assistance. Some situations where handling it yourself is reasonable:

• One or two missing years with straightforward W-2 income
• No IRS enforcement action underway
• Relatively simple tax situations with no self-employment or investment income
• Comfortable using prior-year tax forms and IRS transcript tools

Professional help becomes more valuable – and often necessary – in these situations:

• Three or more years of unfiled returns
• Self-employment income, rental properties, investments, or other complex income sources
• The IRS has filed Substitute for Returns (SFRs) that need to be superseded
• Active collection action: tax liens, wage levies, or bank levies
• Large balances where penalty abatement or Offer in Compromise may be warranted
• Prior IRS notices have gone unanswered and escalation has begun

Typical Services Provided by Back-Tax Professionals

Whether you hire an enrolled agent, CPA, or work with a resolution firm, the services involved in a back-tax case typically include:

IRS Transcript Review

The professional requests and analyzes your IRS account and wage/income transcripts for all affected years. This reveals which years have no return on file, what income the IRS already knows about, whether Substitute for Returns have been processed, and what balances are currently assessed.

Prior-Year Return Preparation

The professional prepares each missing return using the correct prior-year Form 1040 and applicable schedules. They apply all deductions and credits you legitimately qualify for, which often results in a significantly lower tax liability than any SFR the IRS may have processed.

Filing and Submission

Prior-year returns are typically filed by mail. The professional handles mailing each return to the correct IRS address for each year with appropriate certified delivery documentation.

IRS Negotiation and Representation

After filing, the professional handles all IRS communications on your behalf. This includes responding to notices, contacting the IRS to confirm receipt and processing of returns, requesting penalty abatement where applicable, and enrolling you in a payment program if you owe a balance.

Resolution Program Enrollment

If you owe a balance, the professional helps you qualify for the appropriate IRS resolution program – installment agreement, currently-not-collectible status, or Offer in Compromise. Each program has specific eligibility requirements, and a knowledgeable professional can identify which fits your financial situation.

How to Choose a Reputable Professional

With meaningful variation in quality across providers, choosing carefully matters. Here is what to look for.

Verify Credentials

Enrolled agents can be verified through the IRS’s online directory at IRS.gov/tax-professionals. CPAs can be verified through the state board of accountancy in the state where they are licensed. Tax attorneys should be verifiable through the state bar association. Do not work with anyone who cannot provide verifiable credentials.

Check for Disciplinary History

The IRS Office of Professional Responsibility (OPR) maintains records of disciplinary actions against enrolled agents and other tax practitioners. State CPA boards and bar associations maintain similar records. A quick check of these databases reveals whether a professional has had complaints or sanctions.

Ask About Experience With Back-Tax Cases

General tax preparation experience is not the same as experience with non-filer cases, IRS representation, and collection resolution. Ask specifically how many prior-year filing cases the professional has handled, whether they have experience with Offers in Compromise and installment agreements, and how they communicate with the IRS on clients’ behalf.

Understand the Fee Structure

Reputable professionals are transparent about fees. For back-tax work, fees are typically structured as flat rates per year of return prepared, hourly rates for IRS representation work, or a combination. Get a written engagement letter that specifies what is included and what additional costs might arise. Be cautious of professionals who charge very high upfront fees without a clear explanation of what is covered.

Avoid Red Flags

Certain behaviors indicate a professional or firm may not be operating in your best interest:

• Guaranteeing specific outcomes (‘We’ll settle your debt for pennies on the dollar’) – no professional can guarantee IRS decisions
• Asking you to sign a power of attorney without explaining what it authorizes
• Demanding very large upfront fees before doing any work
• Claiming to have ‘special relationships’ with the IRS
• Discouraging you from contacting the IRS directly or reviewing your own account

Free and Low-Cost Help Options

Professional fees can be a barrier for some taxpayers. Several free or reduced-cost options exist.

IRS Volunteer Income Tax Assistance (VITA)

VITA is an IRS-sponsored program that provides free tax preparation for people who generally earn $67,000 or less, have disabilities, or speak limited English. Some VITA sites assist with prior-year returns. Availability varies by location and site capacity; not all VITA sites handle complex back-tax situations. Use the VITA locator tool at IRS.gov to find sites near you.

Low Income Taxpayer Clinics (LITCs)

LITCs are independent organizations that receive funding from the IRS to provide free or low-cost representation to taxpayers with disputes against the IRS. They are particularly useful for taxpayers whose cases have escalated beyond simple return preparation – if you have a formal IRS dispute, an appeal pending, or enforcement action in progress and cannot afford private professional help. The IRS maintains a directory of LITCs at IRS.gov.

Tax Counseling for the Elderly (TCE)

TCE is a program similar to VITA but specifically focused on taxpayers age 60 and older. It is operated primarily through AARP Foundation Tax-Aide sites and provides free tax preparation including some prior-year returns.

How to Vet Any Provider Before You Hire

Verify Credentials Through Official Sources

Every type of licensed tax professional can be verified through a public database:

• Enrolled agents: IRS tax professional directory at IRS.gov/tax-professionals
• CPAs: state board of accountancy license lookup for the state where they practice
• Tax attorneys: state bar association attorney search

If a professional or firm cannot be confirmed through these databases, do not work with them. Legitimate practitioners have verifiable licenses and no reason to obscure them.

Check for Disciplinary History

The IRS Office of Professional Responsibility publishes disciplinary actions against enrolled agents and CPAs practicing before the IRS. State CPA boards and bar associations maintain their own records. Searching these before signing anything adds five minutes and could save you thousands.

Ask the Right Questions

Before committing to any provider, ask: How many prior-year returns have you prepared in the past two years? Who specifically will be working on my case and what are their credentials? What does your fee cover and what might cost extra? How do you communicate with clients during a case? If the answers are vague or the person deflects, that is a signal.

Get Everything in Writing

A reputable professional will provide a written engagement letter specifying the scope of services, the fee structure, and the terms of the engagement. Do not pay meaningful fees without a written agreement that defines exactly what you are getting.

Get Multiple Quotes

Get quotes from at least two or three providers for any engagement involving significant fees. Ask for enough detail to make a real comparison – total fee, what is included, and a rough timeline.

Warning Signs to Walk Away From

Guaranteed outcomes. No professional can guarantee that the IRS will accept an Offer in Compromise, grant penalty abatement, or agree to any specific payment arrangement. The IRS makes these decisions based on financial analysis and its own criteria. Any firm that guarantees specific outcomes is not being truthful.

“Pennies on the dollar” marketing. Offers in Compromise are a real IRS program and they do result in reduced settlements for qualifying taxpayers – but acceptance rates are not as high as the ads suggest, and not every taxpayer qualifies. A firm that leads with this promise before reviewing your financial situation is using it as a sales hook, not an honest assessment.

Large upfront fees with vague scope. A legitimate firm can tell you precisely what services are included in any fee. If the scope of work is not clearly defined in writing, you have no way to hold them accountable.

Pressure to decide immediately. Legitimate professionals do not manufacture urgency. If a salesperson is pushing you to sign before you have had time to review or compare options, walk away.

Starting the Process

Regardless of who you choose to work with, the first practical step is the same: pull your IRS transcripts. Log into IRS.gov, access ‘Get Your Tax Record,’ and download account and wage/income transcripts for each year you believe is missing. Having this information in hand when you first speak with a professional saves time and gives the professional a clear picture of your situation from the start.

From there, the professional can scope the work needed, estimate fees, and develop a filing strategy specific to your circumstances.

Summary

Enrolled agents, CPAs, and tax attorneys are all authorized to help with back taxes, with enrolled agents and tax-focused CPAs being the most common choice for prior-year filing and IRS resolution. Tax attorneys are most appropriate for legal proceedings and criminal concerns. Tax resolution firms offer multi-service support but require careful vetting. Free options through VITA and LITCs are available for eligible taxpayers. Verifying credentials, understanding fee structures, and asking about specific back-tax experience are the most important steps in choosing the right help for your situation.