You probably should file a Colorado Non-Resident return. You did collect Rental Income there (even though your expenses created a rental loss).
Since some of your rental expenses were depreciation (and possibly 179 deduction), Colorado may or may not apply the same guidelines as federal, though from what I could find, they do.
Going through the Colorado interview should verify that.
From the Colorado DOR:
"A nonresident is required to file a Colorado income tax return if they:
- are required to file a federal income tax return, and
- had taxable Colorado-sourced income.
Nonresidents will initially determine their Colorado taxable income as though they are full-year residents. Nonresident of Colorado will complete the Colorado Individual Income Tax Return (DR 0104) and the Nonresident Tax Calculation Schedule (DR 0104PN) to determine what income will be claimed on the DR0104 form."
Here's a link to Colorado DOR.
Why Would I File a Non-Resident Return
@Tax2019Pay
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