You can find the Pyq for the Rajasthan board on the official RBSE website or other educational sites like like by us. vednatu, career360 etc

For Rajasthan Board question papers, you can refer to the website given below:

https://school.careers360.com/boards/rbse/rbse-class-12-previous-years-question-papers-solutions

Previous year question papers are important but do remember to refer to sample question papers provided by the board of studies, because of the frequent changes in the past few years.

All the best