IRS 2026 Dirty Dozen: New Form 2439 Capital Gains Scam Added

The IRS added a new scam to its 2026 Dirty Dozen list: fabricated Form 2439 claims for undistributed long-term capital gains from mutual funds and REITs. If a client shows up with a newly discovered Form 2439 they never received from their fund, that is a red flag.

How the Scam Works

Form 2439 reports undistributed long-term capital gains passed through from regulated investment companies and REITs. Legitimate funds issue these forms when they pay tax on capital gains but do not distribute the cash to shareholders. The shareholder gets a credit for the tax already paid.

Promoters are charging fees to find phantom Form 2439 income that was never reported by the fund. The scam involves:

• Completely fabricated 2439s tied to organizations that are not legitimate investment funds

• Inflated amounts on real forms

• Fake claims falsely linked to real, well-known funds

The IRS says these claims create artificial basis or refundable credits. Criminal investigation is pursuing promoters. Civil penalties for participants range from 20% accuracy penalty to 75% civil fraud penalty.

What CPAs Should Do

If a client brings you a Form 2439 they claim they just discovered, verify it directly with the fund before filing. Mutual funds and REITs that issue Form 2439 send it to shareholders — it is not something you find years later through a promoter.

The rest of the 2026 Dirty Dozen includes phishing, ERC mills, fake charities, spearphishing on CPAs, social media tax advice scams, offshore accounts, syndicated conservation easements, micro-captives, maltese arrangements, Monaco trust scams, and abusive monetized installment sales. Form 2439 fraud is the new entry for 2026.

Why This Matters Now

Tax season is the prime window for these schemes. Clients who already filed with bad advice need to file amended returns to avoid civil fraud penalties. The IRS is actively pursuing these cases at audit.

Bottom line: If it sounds too good to be true, verify before filing. Your client is legally responsible for what is on their return, and the IRS does not care if a promoter told them to do it.

Source: Journal of Accountancy, March 2026