You can give JEE main paper in 2019 and 2020 but you only able to give JEE advance paper in 2019.

As for JEE Advance paper there is only 2 attempts ,in which one attempt is once when you give your boards and another attempt after one year of board.

Hope this help you.If any queries remain than ask .We are here to guide you.

hello

harsh singh 

yeah you harsh singh you can give the JEE mains and advcane which you mentioned in the quesetion is prefectly alright no problem 

you can give the JEE mains twice per year and like that 3 attempts are available 

thank you