DR 0106: Partnership and S Corporation Income Tax Return (form only) (2025)
Colorado · Colorado DOR · Used for tax years 2025
DR 0106 is the Colorado Partnership and S Corporation Income Tax Return. It reports Colorado income tax liability, payments, and credits, including tax paid through a composite return for nonresident partners or shareholders or under a SALT Parity Act election.
Who files this form
Every partnership and S corporation must file DR 0106 for any year it does business in Colorado. The text refers to Rule 39-22-301(1) for the criteria for doing business in Colorado.
An entity treated as a partnership for federal income tax purposes is also treated as a partnership for Colorado income tax purposes. This includes an LLC classified as a partnership for federal tax purposes.
When it's due
For the 2025 tax-year return, the text gives these deadlines:
- File and pay: The fifteenth day of the fourth month after the tax year closes, or April 15 for calendar-year filers.
- Filing extension: An automatic six-month extension, or until October 15 for calendar-year filers. This does not extend the payment deadline. Use DR 0158-N to make an extension payment before filing.
- Weekend or legal holiday: If the due date falls on a weekend or legal holiday, the return is due the next business day.
- Colorado K-1s: Give each partner or shareholder a copy by the return due date, including extensions, and no later than the date the K-1s are filed with the Department. Transmit copies to the Department when filing the return.
What you'll need
Have these records and forms ready:
- Business information: Legal name, any trade name, mailing address, eight-digit Colorado Account Number, FEIN, business activity, organization or incorporation date, and year-end number of partners or shareholders.
- Federal return information: Form 1065 or 1120-S, including the Schedule K and Schedule L information used to complete DR 0106.
- Colorado K-1s (DR 0106K): Complete one for every partner or shareholder and file copies with the Department.
- DR 0106CR: Every partnership and S corporation must submit this completed credit schedule with its return.
- Payment records: Estimated payments, extension payments, and any 2024 overpayment carried forward to 2025.
Additional attachments depend on your situation. Examples include:
- DR 0619 if you elected to receive quarterly advance credit payments.
- DR 0233 if an estimated tax penalty is due.
- DR 1079 for claimed withholding payments from a Colorado real estate sale.
- Forms W-2G for claimed Colorado withholding on lottery or gambling winnings.
- DR 1305G for the gross conservation easement credit claimed on line 15.
- IRS Form 8886 or DR 1831, as applicable, for a listed or reportable transaction.
For the Colorado marijuana and natural medicine business deduction, submit the actual and pro forma federal forms and schedules, plus your Colorado MED or NMD license number.
How to file
You can file and pay through the Department's free, secure system at Colorado.gov/RevenueOnline, using a computer, smartphone, or tablet. The text also allows filing through e-file software or a paid tax preparer.
The return must be signed by a partner authorized to act for the partnership or an officer authorized to act for the S corporation. If a paid preparer completed it, enter the preparer's name and phone number.
If you cannot file electronically, mail the return with the required supporting forms, schedules, and documentation.
With a check or payment:
Colorado Department of Revenue
Denver CO, 80261-0006
Without a check or payment:
Colorado Department of Revenue
Denver CO, 80261-0005
Common mistakes
- Sending an incomplete paper return. The text warns that missing supporting forms, schedules, or documentation will delay processing.
- Treating the filing extension as extra time to pay. No payment extension is available. Interest applies to an unpaid tax balance paid after the original due date.
- Completing both Part II and Part III. A partnership or S corporation may file a composite return or make a SALT Parity Act election, but it may not do both.
- Leaving unchanged items off an amended return. Complete every field and resubmit all schedules and supporting documentation, even if nothing changed in those items.
- Overlooking prepayments. The text says to carefully review payment records when completing line 25.
- Entering incorrect direct-deposit details. Confirm the information with your financial institution. Account numbers may include hyphens, but not spaces or special symbols.
Questions people ask
How do I correct a return I already filed?
Complete a new DR 0106 and check the “Amended Return” box. Fill in every field and include all schedules and supporting documentation, even those unchanged from the original return.
How do I make a SALT Parity Act election?
Check box I on DR 0106. The election can also be made through DR 1705 or the election box on DR 0106EP filed with an estimated payment. Check box I even if you previously elected through one of those forms. Complete Part III, not Part II, and mark the SALT Parity Election box on every Colorado K-1.
Does every partner or shareholder need a Colorado K-1?
Yes. Prepare a DR 0106K for each partner or shareholder for each tax year, provide each person a copy, and file the completed K-1s with the Department.
Can a refund be deposited into a bank account?
Yes. Enter the routing number, account number, and account type to authorize direct deposit. Otherwise, a refund check will be mailed to the address on the return. The Department will intercept a refund if you owe taxes or other debts to Colorado or the IRS.