You are mistaking "getting money back" for "getting money when your tax bill was already zero". The latter is called "refundable". This credit is not refundable.
When you do your taxes, you see how much your tax bill is, and how much was withheld for that during the year. If more was withheld than your tax bill is, you get a refund. With this tax credit, that amount of $$ is added to your refund. That is what you see.
However, if you do your taxes, and your tax bill was $0, you will *not* get the 26% in your pocket. The tax credit here is subtracted from your bill, but won't make the number negative.
When you do your taxes, you see how much your tax bill is, and how much was withheld for that during the year. If more was withheld than your tax bill is, you get a refund. With this tax credit, that amount of $$ is added to your refund. That is what you see.
However, if you do your taxes, and your tax bill was $0, you will *not* get the 26% in your pocket. The tax credit here is subtracted from your bill, but won't make the number negative.