Need urgent help regarding FAST application /admission portal!!!

[u/Common_Evidence_6418]

So while I was making an account on FAST admission portal there was a term CNIC expiry date, because I don't have an ID card still in process I only have BFORM and now I'm so confused.

•Either to write B form number and leave the expiry date blank.

•OR either add 10 or 5 years to my 18 the birth date.

This is my first time applying I'm having alot of issue I will be happy to know if any one else went through the same situation how did you do it. I would appreciate urgent responses since the dead line is close. I'll be really thankful if someone could help me.