I have Dependent Care benefits, it shows on box 10 of my W2. I am being asked how much money I had left over at the end of the year. How do I know this information?

I have Dependent Care benefits, it shows on box 10 of my W2. I entered that in as instructed. I am being asked how much money I had left over at the end of the year. How do I know this information? How do I know the total that I was allowed for the year?