Answer: Refundable Tax Credit
Step-by-step explanation:
When a tax credit is able to reduce your tax liability to below zero and then the remainder is returned to you, that is a Refundable Tax Credit. For Instance, if you get a Refundable tax credit from the IRS of $300 and your Tax Liability is $250 then not only do you not have to pay the liability but the IRS will give you $50 which is the remainder after the tax credit reduced the liability to $0.
If you have $0 in Liability, you can still apply for a Refundable Tax Credit which means that you will be paid the whole thing.
Some people therefore first calculate their taxes and then remove the deductions and apply for Non-refundable tax credits and then when their liability is at the lowest, they apply for a Refundable Tax Credit which then means that they can stand a chance to get something from the IRS.