I am a Colorado resident and e-filed my state taxes. I use the Annualized Installment method (Colorado Form 204) so I don't pay a penalty for underpayment. TurboTax does not include this form, so I was hit with a penalty this year. I note that another correspondent in Massachusetts had exactly the same problem with her/his state tax return. So I'm done paying their $25 e-file fee for an erroneous filing. Time to get this fixed, TurboTax!
Colorado Form DR 0204 is available in TurboTax, whether you choose to e-file or print and mail your return.
To ensure there are no errors with the form, I completed a mock Colorado return. I was successful in being able to use the annualized installment method for computing a penalty and noted that Form DR 0204 calculated correctly. Additionally, it is listed under the official forms required for filing print view, as well in the tax return print view.
Please see the screenshots below.