hi,

no, you can't write jee advanced without jee mains in the same year.if you wanna give jee advanced in 2020, i think there'll be no option like that.they won't consider the previous year results.

so you've to give jee main befor giving jee advanced.to check the eligibility criteriae,please refer this link:

https://engineering.careers360.com/exams/jee-advanced

all the best!

I Hope this information will be useful to you.

if you need additional information,let us know to help you.

Thank you!!!:)