You will first need either your BRP card number or visa application number. Your visa application number will have been sent to you via email or post.
If you do not have any of the above information, please visit: Online immigration status (eVisa) - (www.gov.uk)
In addition to your BRP or visa application number, you will also need to provide your:
Once you have the above information complete the following 3 steps to create the UKVI account:
Step 1: Create a UKVI account full details
If UKVI have advised you to create an account, follow their instructions, otherwise visit: Online immigration status (eVisa) - (www.gov.uk)
Step 2: Confirm your Identity
This is done via an app: UK Immigration: ID Check
You will need to download the app onto a smartphone and use the camera to scan a QR code.
Step 3: Link your UKVI account to your eVisa
UKVI will notify you when your eVisa is available to view - in some cases, this could take a few days. Full details on linking your UKVI account with your eVisa can be found here: https://www.gov.uk/get-access-evisa