Child and Dependent Care Credit Decreased from $1200 to $200. Why?

We have 3 kids, over $6,000 in yearly child care costs, and income over $43,000.

 

In 2018 we filed using TurboTax.   It generated a Form 2441 and Schedule 3 that gave us a full $1200 child and dependent care credit.

 

For 2019, it is only showing a $200 credit, even though our situation has changed very little.

 

My understanding is it is a 20% credit of up to $6000 in care costs for 2+ children.  That should be $1200 like last year.  Why is it only showing $200 for this year?

 

I posted this prior and the first response suggested it was because our total tax was $0.  I mistakenly thought that was correct and marked it as best answer, but we do have a total tax of $1700.   Reposting for more ideas.  Thanks.