hi,

see every year cutoff score changes and it depends on certain factors like number of participants, questions difficulty level, seat matrix etc, jee main april session exam is yet to held and if the number of candidates increased this time it would have effect on your current score and percentile. now since exam has delayed there is chances for increasing of nominal score.

as for all india quota it would be best to remain in safe side if you score arounf 270-280.once again it depends on questions structure, candidates category , choices of streams,. so just prepare sincerely and relax and never do very much tension.

careers360 has jee main knockout program which you may use to boost up your performances,

https://learn.careers360.com/knockout-jee-main-april/