Received a CP11 from the IRS. When we filed with Turbo Tax it said we were to receive a refund-now with this letter it's saying we owe the IRS-need help?

I wonder if this is similar to my problem. My refund will be smaller than I thought. See my post above and see if TT did the same thing to you.

Good luck.

The 2 most common reasons this year is you entered the wrong amount on line 30 for the Recovery Rebate Credit (3rd Stimulus payment) or line 28 for the Child Tax Credit.  Those lines are just if you didn't already get the full amount or qualify for more.  The IRS knows what they already sent you.  

A lot of people answered the questions wrong and tried to claim the credits again.  Double check your bank statements to see what the IRS sent you during the year for the 3rd Stimulus payment and Advance Child Tax Credit .