Once you enter your HMRC credentials to your software, your software pre-fills these details during submissions.

If you have more than one company with different credentials, change the credentials when you make the P11D submissions.

1. In the menu bar at the top of your software, select Internet Submissions.
2. Select e-Submission Settings.
3. Enter your HMRC User ID and Password.
   
   NOTE:

   If you aren't certain of these details, contact HMRC for support.

4. Enter your details to the Contact Details section.

You can now submit forms P11D and P11D(b) online, once you process your benefits.