Hello aspirant, Jee advanced syllabus is almost 90 percent similar to jee mains syllabus, you only have some additional topics in jee advanced, You can refer https://engineering.careers360.com/articles/jee-advanced-syllabus for that syllabus. Make sure you-

1. Have a notes for the last minute preparation
2. Practice more number of problems to solve quickly
3. Complete the syllabus and recall the formulae.
4. be confident,

Thank you.