Form 107

I am completing my articlship as on 02-04-2017, but at the time of fillling exam form i wrote that my articlship will complete on 29-04-2017. so, now what  can i do. 

what i write on form 108 that my articlship will complete on which date?

whether i have to fill form 107.

or either i will write on form 108 that my articlship will complete on 02-04-2017.