To download previous year question papers for CA Foundation exam, follow the steps below:

1. Go to the official website of the Institute of Chartered Accountants of India (ICAI) - icai.org
2. Click on the "Students" tab on the homepage and select the "BoS Knowledge Portal" option from the drop-down menu.
3. On the next page, click on the "E-Learning" tab and select "CA Foundation" from the options.
4. Under the "CA Foundation" section, click on the "Question Papers" option.
5. Select the year and attempt for which you want to download the question paper.
6. The question paper will be displayed on the screen in PDF format.
7. Click on the download button to save the file on your device.

Alternatively, you can also download CA Foundation question papers from EduRev, a trusted online educational platform. Follow the steps below:

1. Go to the EduRev website - edurev.in
2. Select the "CA Foundation" option from the homepage.
3. Click on the "Question Papers" tab.
4. Select the year and attempt for which you want to download the question paper.
5. The question paper will be displayed on the screen in PDF format.
6. Click on the download button to save the file on your device.

It is important to note that downloading previous year question papers is a crucial step in exam preparation as it helps in understanding the exam pattern, marking scheme, and types of questions asked in the exam. It also enables students to practice and improve their time management skills, which is essential for scoring good marks in the CA Foundation exam.