Hello Aspirant

By looking at past years cutoff there is a possibility that you can get admission in IIIT Allahabad in 2020 because the closing rank lies around 4000-4100 and in special rounds it has even gone to 18,000 if you are a female then your admission in 2020 is 100% guaranteed as the rank has gone to 9000 till now but if you are a male then you might need to wait as by round 5 it has gone only till 3661 right now wait till round 6 if you still don't get admission then you can try special round .You can check yourself in the link provided

https://engineering.careers360.com/articles/jee-main-cutoff-for-iiit-allahabad

Hope this helps you