Yes, you can access previous year question papers of the SSC CHSL Tier-I Exam for different years, such as 2019, 2020, or 2021. Here is how:

1. Official Website:
- Visit the official website of the Staff Selection Commission (SSC) at www.ssc.nic.in.
- Look for the "Previous Year Question Papers" or "Question Paper" section on the homepage.
- Navigate to the SSC CHSL Tier-I Exam section.
- Here, you can find the question papers for different years, including 2019, 2020, and 2021.

2. EduRev Website:
- EduRev is a reputable online platform that provides study material and resources for various competitive exams, including the SSC CHSL Tier-I Exam.
- Visit the EduRev website at www.edurev.in.
- Look for the "SSC CHSL Tier-I Exam" or "Previous Year Question Papers" section.
- Choose the year you are interested in, such as 2019, 2020, or 2021.
- You can find the SSC CHSL Tier-I question papers for the selected year in PDF format, which you can download and use for your preparation.

3. Online Forums and Discussion Groups:
- Join online forums and discussion groups dedicated to SSC CHSL exam preparation.
- Platforms like Quora, Reddit, or SSC-specific forums provide a space for aspirants to share resources and information.
- Search for threads or posts discussing previous year question papers for the SSC CHSL Tier-I Exam.
- Users often share question papers and study materials, including those from 2019, 2020, or 2021.

Important Note:
- While accessing previous year question papers is helpful for exam preparation, it is important to note that the SSC CHSL Tier-I Exam pattern and syllabus may undergo changes each year. Therefore, it is advisable to refer to the latest official notification and exam pattern provided by the Staff Selection Commission for accurate and updated information.