Auditing for Due Diligence Compliance

Audits for compliance with due diligence for certain tax benefits, such as the earned income tax credit (EITC), child tax credit (CTC), including additional child tax credit (ACTC), credit for other dependents (ODC), American opportunity tax credit (AOTC) and/or the head of household (HOH) filing status, as defined by IRS Section IRC 6695(g) are another tier of our Preparer Compliance Program. We look at returns with a high chance of errors completed by the same preparer and use that information to select preparers for due diligence visits. We may have contacted the preparer using one of the other tiers of our Preparer Compliance Program, but we don't use all of them for every preparer. (See Preparer Compliance - Focused and Tiered for information on the other tiers).

Due Diligence Visit

Before the filing season begins, IRS employees conduct due diligence visits based on the prior year returns. These due diligence visits are either face-to-face or conducted via correspondence. IRS will contact you with either Letter 6199 (Due Diligence Visit Request) or Letter 6222 (Correspondence Due Diligence IDR) to initiate a due diligence visit. These letters ask you to respond within 14 days to either set up an appointment at your office (Letter 6199) or send information and schedule a telephone interview (Letter 6222). Please call the examiner listed by the date noted. The examiner will give you more information and talk to you about the next steps. If this is a face-to-face visit, the examiner will send a follow-up Letter 6200 (Due Diligence Visit Appointment Confirmation) to confirm your conversation and appointment date.

During the filing season, we may conduct due diligence visits without advance notice, however, we would have previously sent you a letter regarding a potential examination. (See Reaching Out to Preparers for examples of the letters)

What Happens During Your Due Diligence Visit?

When the visit begins, the IRS employee will provide their official IRS identification. The employee will interview you about your business practices. The IRS employee is looking for compliance with all four due diligence requirements.

The IRS employee will look at a minimum of 25 client returns/files and will review the following documents (including but not limited to):

  • Your due diligence records,
  • The probing questions you asked your client, and your client's responses,
  • All questionnaires, checklists, worksheets and
  • Copies of any client provided documents relied on to determine eligibility for HOH filing status, or to determine eligibility for, or to compute the amount of, the EITC, CTC/ACTC/ODC, and/or AOTC.


If the IRS employee identifies failures to meet due diligence requirements on the 25 client returns initially reviewed, they may expand the examination to review an additional 25 client returns.

During the examination, the IRS employee is looking for evidence showing that you met all the requirements under Section 6695(g), especially when it comes to knowledge and record retention. To meet the knowledge requirement, you must:

  • Know the law
  • Ask the right questions, especially when your client gives information that appears incorrect, inconsistent or incomplete 
  • Document the questions asked and the responses given by your client
  • Get all the facts to make sure your client truly qualifies for EITC, CTC/ACTC/ODC, AOTC and/or HOH filing status

To meet the record retention requirement, you must keep copies (either electronic or paper) of any client provided documents that you relied on to compute the credits or determine that they were eligible for the Head of Household filing status. These records must be kept for 3 years from the due date of the return or date the return was filed (whichever is later).

While auditing for due diligence, we also check that you are in compliance with the PTIN, (Preparer Tax Identification Number) requirements, as well as your personal and business tax return filing requirements.  

What Happens If My Records Don't Show I Met the Due Diligence Requirements? 

We will propose penalties when we find you did not comply with due diligence requirements. We continuously improve our examination selection process to find those preparers with a high likelihood of filing returns with errors. Using this process, we proposed penalties on over ninety percent of the preparers we selected for examination. We propose most penalties against preparers who did not meet the knowledge and record retention requirements.

The penalty for not meeting due diligence requirements is $600* for each credit (EITC, CTC/ACTC/ODC and AOTC), or HOH filing status claimed on a 2023 tax return.   

*The penalty amount is adjusted for cost of living under IRC Section 6695(h).

What If I Don't Agree with the Penalties?

See Appeal of Due Diligence Penalties

Additional Resources

Return to main Refundable Credit Preparer Compliance page