For appearing in JEE Main, there is no minimum percentage requirement in your 12th class marks. However, for admission to IITs, NITs, IIITs, and CFTIs, you will need at least 75% marks (or be in the top 20 percentile) in your 12th class exams. If you are from a reserved category (SC/ST/PwD), the minimum is 65%.

In simpler terms:

To take the JEE Main exam: You can appear regardless of your 12th-grade percentage.

To get into an IIT, NIT, IIIT, or CFTI: You need to meet the 75% or top 20 percentile requirement in your 12th class.

For JEE Advanced (to get into IITs): You need 75% marks (or be in the top 20 percentile) in 12th. Reserved categories need 65%.

Your 12th marks don't affect your JEE Main rank .

Therefore, you can share your 12th marks, but they won't determine your eligibility for JEE Main itself, only for admissions to certain institutions based on JEE Main scores.