Don't Worry

You will be able to  find your application number in challan if you have paid the fees for CET, you should have the candidate copy with you  then.

For example- KEA Ref Number 1213344001 it will be given. In the example neglect the first number &  start from  the second number it should be 6 digit number for your application number

i.e for the given number it should be 213344

Hope you find it useful