Take part in counseling so that you can get good college based on your marks
With the score of 140 out of 300, you can expect your percentile to be 98.4-98.7. With this percentile, your predicted rank would be around 12000-15000.
At this rank, you will be qualified for JEE Advanced. Also, if you wish to go for NIT you will get a decent branch at a decent NIT.
To check the cutoff scores and other mains related prediction kindly make use of the link provided below:
JEE Main Sample Papers
JEE Main Previous Year Question Papers with Answer Key