Sounds like you need to be paying ES rather than ignoring TT, for both Fed and State. If you got a notice from CO presumably you will get one from Fed also.
You need to pay thru the year via withholding or timely (usually quarterly) estimated tax, the smaller of 100% of your 2024 tax (110% if AGI > 150k) or 90% of your 2025 tax - this is your 'safe harbor' amount. Check CO tax code if they use the same or different.
However, note TT will generate ES vouchers based on your 2024 tax by default, assuming your 2025 withholding is the same as 2024. If your income is stable that can often be an overpayment in ES. You need to determine what your safe harbor amount is. In TT under Other Tax Situations / Form W4 and Estimated Tax Payments you can provide 2025 information and it will update the vouchers if paying ES baed on current year tax is more advantageous. If using desktop TT check Forms mode, "Est Tax Options" to see the calculation.
If you owe ES you can also increase withholding to cover it, tho there are only 6 months left in the year to make up for that.
If you do need to pay ES but didn't pay Q1 ES then you can minimize the penalty by paying 50% of the total ES for the year in Q2 (due date 6/16/25). You will still get some penalty for missing Q1 but the sooner you pay it the sooner the penalty stops accruing.
Finally to make ES payments, don't bother with checks and vouchers, pay IRS directly online if able at irs.gov
For more info on ES see https://www.irs.gov/faqs/estimated-tax
