When taxpayers fail to file, the IRS may prepare a Substitute for Return under IRC §6020(b) using third-party income data with no deductions, credits, or dependents. SFR assessments are almost always higher than what the taxpayer actually owes.
An at-a-glance view of every step covered in this guide.
The IRS files as single or married-filing-separate with standard deduction only. Cost basis is treated as zero on stock sales. No business expenses are allowed against 1099-NEC income. Balances are routinely 2–5× actual liability.
The taxpayer files an original return for the SFR year. Once processed, the assessed SFR is abated and replaced with the correct number. This is the single most impactful step for taxpayers with multiple SFR years.
Yes. The CSED runs from the SFR assessment date, not the original return's due date — often extending IRS collection powers.
IRS Policy Statement 5-133 generally requires the last 6 years to be current for compliance. Filing earlier years is optional unless a refund is possible (3-year lookback) or a specific need exists.
Only if the return is filed within 3 years of the original due date (§6511). Refunds on older years are permanently forfeited even if the return is filed later.
Rarely, and the audit risk is usually less than leaving the SFR in place. Filing replaces an inflated SFR balance with a correct number and starts a normal CSED clock.
A licensed tax attorney will pull your IRS transcripts, review your situation, and walk you through the resolution options that fit — no obligation.