I got 67 percentile qualified or not in St catagory

Hello Mohan

It is difficult to predict the actual rank or JEE Advanced qualifying marks as for the first time JEE Main is being conducted twice and rank will be based on NTA percentile score.
You might be eligible for the Advanced exam but this is not clear. Nothing can be exactly said before the results of the April exam.

You can go through the link below and use the Rank Predictor tool to check your expected rank-

https://engineering.careers360.com/jee-main-rank-predictor

Good Luck!

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According to the experts,  JEE Main aspirants securing around 70 percentile and above will qualify for the next stage of the examination i.e. the JEE Advanced examination.  The exact cut off hasn't been declared yet by the NTA. I highly recommend you to wait for the official announcement by the official site.

All the very best to you!!