If you miss the April 15 – May 17, 2021 – deadline to prepare and e-File a 2020 Tax Return or you e-Filed an extension by that date, you can e-File your 2020 Taxes until October 15, 2021.

What is the tax filing deadline for Colorado?

The Colorado tax filing and tax payment deadline is April 15, 2021 May 17, 2021. If you file a tax extension you can e-File your Taxes until October 15, 2021 without a late filing penalty. However, if you owe Taxes and don’t pay on time, you might face late tax payment penalties.

When is last day to efile Colorado State tax return?

Tax Year 2018 Income Tax Return after the automatic April 15, 2019 Colorado Tax Extension. Last day to eFile a 2018 Colorado State Income Tax Return for Tax Extension Filers and late eFilers. You can only eFile (to file by paper see below) Colorado Income Tax Return together with an IRS Tax Return.

When do I need to file my 2018 Colorado tax return?

2018 Tax Year Colorado Income Tax Forms. Colorado State Income Tax Forms for Tax Year 2018 (Jan. 1 – Dec. 31, 2018) can be e-Filed in conjunction with a IRS Income Tax Return until October 15, 2019. Details on how to only prepare and print a Colorado 2018 Tax Return.

Where to find amended tax return in Colorado?

The amended return information can be accessed in the program from the main menu of the Colorado return by selecting Heading Information Menu > Amended Return where the return can be marked as an amended return (Form 106X).

When is the deadline to file an extension in Colorado?

Automatic Colorado State Income Tax Extension. For Tax Year 2020, you can no longer e-File an extension for Colorado Tax Returns. Unlike the IRS, Colorado grants all taxpayers an automatic 6-month extension (which means you do not file an extension form in Colorado) of time to file penalty free beyond the April 15, 2021 deadline.