That late‑night save is why I am firm about one thing, you need a tight, repeatable process for Form 1066 and Schedule Q, because the IRS expects precision and your investors expect predictability.
Key Takeaways
- You file Form 1066 if your entity elected REMIC status and still qualifies, you report income, deductions, gains, and losses, and you compute and pay taxes on prohibited transactions, foreclosure property, and certain contributions after startup day.
- The return is due each year on or around March 15 for calendar‑year REMICs, for example the 2024 return is due March 15, 2025, with a 6‑month extension available on Form 7004 when filed by the original due date. Weekend and holiday rules apply.
- You must prepare and deliver Schedule Q to each residual interest holder by the last day of the month following the quarter’s end, and you attach the original copies to Form 1066. The four quarters must reconcile to Section I, line 15 of Form 1066.
- Mail Form 1066 to the IRS in Ogden, Utah, using the address that applies to your situation, or follow current IRS guidance if your software supports e‑filing.
- The current OMB control number on Form 1066 and Schedule Q is 1545‑0123, confirm this on the PDFs you file.
Practical rule I use, tie out the four Schedule Qs to Form 1066 before partner review, then again after any last‑minute adjustments.
What Form 1066 Is, in Plain English
Form 1066 is the annual U.S. REMIC income tax return. If you elected REMIC status and still meet the requirements in section 860D, you file Form 1066 each year. The form reports the REMIC’s taxable income or loss and includes schedules that compute any tax due on prohibited transactions, foreclosure property, and contributions after the startup day. Think of it as the REMIC’s backbone return, even though tax on ordinary REMIC income is borne by investors, not the REMIC.
A few definitions matter. A REMIC must have only regular and residual interests, it must follow a calendar tax year, and it must maintain qualified mortgages and permitted investments, generally starting at the close of the third month after the startup day. If you no longer meet these standards, the REMIC election can terminate, and your filing changes.
When You File, Extensions, and the Weekend Rule
Most REMICs are calendar year filers. The due date is the 15th day of the third month following the tax year, which means March 15 for calendar year filers. If March 15 falls on a weekend or legal holiday, your return is timely if it is postmarked by the next business day. If you need more time, file Form 7004 by the original due date for an automatic six‑month extension, for example to September 15 for calendar‑year returns. The extension gives you more time to file, not more time to pay any tax due.
For 2024 calendar‑year REMICs, the due date was March 15, 2025. The same pattern applies each year, check the calendar and apply the weekend rule. I recommend setting calendar holds one week before the date you expect to file or extend.
Schedule Q, What It Does and When It Is Due
Schedule Q is the quarterly notice that tells each residual interest holder the share of REMIC taxable income or net loss for that quarter, the excess inclusion under section 860E, and that holder’s share of section 212 expenses. You must complete a Schedule Q for each person who held a residual interest at any time during the quarter, send a copy to the holder by the last day of the month after the quarter ends, and keep a copy with your records. The original Schedule Qs for all four quarters are attached to the annual Form 1066.
Two reconciliation points keep you out of trouble. First, the total for line 1a across the four quarters must match Form 1066, Section I, line 15. Second, for each holder, confirm the math for daily portions and ownership changes during the quarter. I build a small tie‑out tab in the workpapers so reviewers can see the bridge in seconds.
Where and How You File
Unless IRS updates say otherwise, mail the return to Ogden, Utah. If the REMIC’s principal place of business is in the United States, use Department of the Treasury, Internal Revenue Service, Ogden, UT 84201‑0007. If outside the United States or in a U.S. territory, use Internal Revenue Service, P.O. Box 409101, Ogden, UT 84409. Some software may offer e‑file for 1066, however always check the current IRS page for Form 1066 for the latest availability and instructions.
I also recommend paying any tax via EFTPS on or before the due date for payments, which is the 15th day of the third month after year‑end. Keep confirmation numbers with your return copy.
How To Prepare Form 1066 Without Fire Drills
Prep the Source File
- Gather the trust or pooling and servicing agreement, trustee or servicer reports, cash flow statements, and any offering materials that describe residual and regular interests.
- Confirm the EIN, startup day, and calendar‑year status, and update addresses with Form 8822‑B if needed.
Build Standard Workpapers
- Create a tie‑out from trustee or servicer reports to Section I lines for income and deductions.
- Track interest accruals to regular interest holders and other interest separately, because they map to different deduction lines.
- Maintain a quarterly subledger that feeds each Schedule Q, then roll the four quarters to Form 1066, Section I, line 15.
Complete Section I, Income and Deductions
- Record taxable interest, accrued market discount, ordinary gains or losses, and other income per the instructions, then compute total income.
- Enter deductions including amounts accrued to regular interest holders, depreciation if applicable, and other deductible expenses allowed to REMICs.
- The result is taxable income or net loss on line 15, which must tie to Schedule M and your Schedule Q roll‑up.
Compute Taxes Where Applicable
- Use Schedule J to calculate tax on prohibited transactions, net income from foreclosure property at 21 percent, and contributions after the startup day, then total tax on line 12.
- Enter tax paid with Form 7004, and reconcile to tax due or overpayment in Section II. Keep EFTPS confirmations.
Assemble, Sign, and File
- Assemble the return with required schedules, include original Schedule Q copies for all quarters, and complete the paid preparer authorization if you want the IRS to contact your preparer.
- Sign the return, check the address, and mail or e‑file per current IRS guidance.
Schedule Q, Step‑By‑Step
Identify Residual Interest Holders
- For each quarter, list every person who held a residual interest at any time during that quarter, gather identifying numbers, and confirm entity type.
- Track ownership changes inside the quarter, because daily portions under section 860C and accruals under section 860E depend on days held.
Fill Out Key Lines
- Line 1a, the REMIC’s taxable income or loss for the quarter.
- Line 1b, each holder’s share based on daily portions for the days they held the interest.
- Line 2a and 2b, excess inclusion mechanics under section 860E, then compute line 2c for the holder.
- If required, report section 212 expenses and the holder’s share on line 3. For individuals, section 212 expenses are not deductible as miscellaneous itemized deductions for tax years 2018 through 2025, so they are picked up as income.
Deliver and Attach
- Deliver a copy of Schedule Q to each residual interest holder by the last day of the month following the quarter end, for example, deliver Q1 notices by April 30.
- Attach the original Schedules Q for all quarters to the annual Form 1066, and retain copies with your records.
Penalties, Extensions, and Payments
Late happens, however know the stakes. If the return is 60 or more days late, the minimum failure‑to‑file penalty is the smaller of the tax due or 510. If no tax is due, the IRS may charge a section 6698 penalty of 245 per residual interest holder per month, up to 12 months. The failure‑to‑pay penalty is generally 0.5 percent per month, capped at 25 percent, unless you show reasonable cause. File Form 7004 by the original due date to secure a six‑month automatic extension to file. It does not extend time to pay.
For timeliness, the weekend and legal holiday rule protects you when you mail by the next business day. Keep proof of mailing or private delivery service tracking. When in doubt, build a one‑day buffer into your calendar.
Addresses, E‑Signatures, and Practical Filing Notes
Mail U.S. based REMIC returns to Department of the Treasury, Internal Revenue Service, Ogden, UT 84201‑0007, and foreign or U.S. territory filers to Internal Revenue Service, P.O. Box 409101, Ogden, UT 84409. Confirm addresses on the current instructions at filing time. Some 1066 returns may flow through IRS processing systems that recognize electronic filings, however availability depends on software and IRS program updates, so always check the current IRS Form 1066 page before you plan to e‑file.
Pro tip, verify the OMB control number on the PDF you are filing. For 2024 Form 1066 and Schedule Q, the OMB number is 1545‑0123, shown on the forms themselves. This is an easy quality check that your package is current.
Wow Factors, Reviewer Shortcuts, and a Ready‑To‑Use Checklist
Reviewer Shortcuts I Use
- Quarter‑to‑annual bridge, a single tab that adds the four Schedule Q, line 1a amounts and ties them to Section I, line 15.
- Residual holder roll, a grid that shows daily portions for each holder and each quarter, with ownership change dates highlighted.
- Section 212 impact, a quick calc that shows individuals how line 3b will be reported as income, not a deduction, for 2018 through 2025.
REMIC Filing Checklist
- Confirm REMIC status, election still in effect, and calendar tax year.
- Pull trustee and servicer reports, tie to income and deduction lines.
- Complete Section I, compute line 15, and populate Schedule M.
- Use Schedule J to compute any prohibited transaction tax, foreclosure property tax at 21 percent, and tax on contributions after startup day.
- Prepare four Schedule Qs, one per quarter, deliver to holders by the last day of the month after each quarter, and attach originals to Form 1066.
- Assemble, sign, calendar the due date, and if needed file Form 7004 by the original due date for a six‑month extension.
- Mail to the correct Ogden address, keep proof of timely mailing, and save EFTPS confirmations for any tax due.
Quick Reference Table
| Item | What you do | Where it shows | Source |
| Annual due date | File by the 15th day of the third month, for calendar year filers this is March 15 | Instructions, When To File | ( |
| Extension | File Form 7004 by the original due date, six‑month extension to file, not to pay | Form 7004 instructions | ( |
| Schedule Q delivery | Send to each residual interest holder by last day of month after quarter end, attach originals to Form 1066 | Schedule Q instructions | ( |
| Where to file | Ogden, UT 84201‑0007, or P.O. Box 409101 Ogden, UT 84409 for foreign or territory | Instructions, Where To File | ( |
| OMB control number | Confirm 1545‑0123 on current PDFs for 1066 and Schedule Q | Form PDFs | ( |
FAQs
Who must file Form 1066 each year?
You file Form 1066 if the entity elected REMIC status for its first tax year and still meets section 860D requirements. The REMIC uses Form 1066 to report income, deductions, gains, and losses, and to compute taxes on prohibited transactions, foreclosure property, and certain contributions.
What is the due date for a calendar‑year REMIC?
It is the 15th day of the third month after year end, which is March 15 in most years. If the date falls on a weekend or legal holiday, mailing by the next business day is timely. An automatic six‑month extension is available by filing Form 7004 by the original due date.
When are Schedule Q notices due to holders?
For each quarter, send the notice by the last day of the month after the quarter ends, then attach the originals for all quarters to the annual Form 1066. Reconcile the four quarters to Section I, line 15 before you file.
Can I amend a REMIC return?
Yes. If you discover changes after filing, the IRS instructions direct REMICs to file Form 1065‑X and to issue amended Schedule Qs to residual interest holders, checking the amended box. Route amended packages to the Ogden Accounts Management team per IRS processing guidance.
What penalties apply if I file late?
If the return is 60 or more days late, the minimum failure‑to‑file penalty is the smaller of the tax due or 510. If no tax is due, the IRS may assess a section 6698 penalty of 245 per residual interest holder per month, up to 12 months. A failure‑to‑pay penalty is generally 0.5 percent per month, capped at 25 percent, unless you show reasonable cause.
Light Touch, Serious Control
If you are buried in quarter‑end and year‑end workloads, this is where a disciplined team helps. At Accountably, we plug into your templates and systems, prepare Form 1066, produce Schedule Qs on a reliable calendar, and build the tie‑outs reviewers love. We keep mentions of tools minimal and the workpapers clean, which means fewer review cycles and predictable delivery when your partners need it most.
Author, Date, and Note
- Written by our tax operations team, reviewed on December 2, 2025.
- This guide is educational, it is not tax advice. Always confirm your facts against the current IRS instructions and your counsel. For the latest, check the IRS Form 1066 page and instructions before you file.