1 - Open the Sophos Home application and click on Dashboard or Manage Devices button
2 -If needed, enter your Sophos Home account email and password
3- If desired, check the box for “Allow the current user on this computer to access your dashboard without signing in” 
For additional details, please visit Direct Access or Single Sign On

1. Navigate to https://my.sophos.com
2. Enter your email address and password, then click on the green Sign In button.
3. If needed, enter the MFA code OR verification code 
                         
   
   
4. You are now logged in to your Sophos Home account dashboard and can manage your protected devices, add new ones, and access support (Premium users)
   
   Additional information
   The verification code email will come from no-reply@mail.home.sophos.com   
   If you did not receive the verification email, it was likely intercepted by a spam/junk mail filter. Check your spam/junk mail folders for it, AND check your junk mail settings to ensure it is not getting blocked. You can also whitelist no-reply@mail.home.sophos.com per your email provider's settings. 
   
   

Premium users can manage their computers via the Sophos Home mobile dashboard app. Find more details in this article: Sophos Home app- Mobile management