There are 2 ways to track your income tax refund.
You can either visit the income tax portal or the NSDL portal to check the status of your refund.
To check the status of refund on the income tax portal
Step 1: Log in to your account on the Income Tax portal with your login credentials
Step 2: Click on ‘My Account’ > ‘Refund/Demand Status’ from the pop-up menu
Step 3: Enter the assessment year for which you would like to check the refund status
Step 4: You will be able to view your Refund/Demand Status
To check the status of refund on the NSDL website
Step 1: Navigate to the NSDL website
Step 2: Enter the PAN and Assessment Year and click on 'Proceed'
Step 3: You will be able to view your Refund/Demand Status
Here's a complete guide on Income Tax Refund.