Hello

No, there will be no problem if it was optional.

Moreover,

If there's something important then it is marked as important and without filling it you are not able to submit your form.

To help you further,

If I tell you about qualifying cut off marks then,

Cut off marks will be more or less similar to previous years and when we go through past year qualifying cut off trends then last 3 years qualifying cut off data is given below for reference :-

To get the complete list of colleges in which you have chances, you can go through our college predictor at

https://medicine.careers360.com/neet-college-predictor?icn=QnA&ici=qna_answer

With the help of predicted colleges you can make better choice while filling your choices of colleges during your counselling

To help in your counselling, we have mbbs companion in which in addition to college predictor tool you also get information regarding various counselling i. e all india , deemed, central and state  counselling and you get to attend live webinars with experts to guide you and get all your doubts cleared. The link is given below:-

https://www.careers360.com/mbbs-companion?utm_source=qna

Thank you