I do not want to claim the full amount of my unused tuition fee this year. Should i enter the full amount in the unused tuition page or just the amount i want to claim?

E.g.  I want to claim only $10k for my tuition this year ( I have $30k in total unused tuition fee from the previous years). In the page of "Your unused tuition and education amount", should I enter $10k or $30k? If I enter $10k, the summary gives me the amount claimed for this year is $10k, but the unused amount from previous years is also $10k, which does not make sense.