How do I determine my unused tuition amount?

I logged into my CRA account and found "Carryover amounts" under my "Tax returns" tab.  The first column is 2017, not 2018.  Also, the "Amount available for carry forward" in 2017 is blank.  This reads like I no longer have unused tuition credits.  However, the 2017 amount was +$26,000.00.  I thought only $5000 is applied in one year.