If your company has requested a licence or credential to be provided before you start work, you can do this from your mobile phone without needing to login on a computer.
Log into the app and you will see a request for any outstanding credentials on your Home page when you login in your Action Items list.
Click on the task to complete the form, including uploading a photo or scan of your licence from your phone. Submit the form to send this credential to HR for review. Once you have submitted a credential you will not be able to edit it or view it, unless HR rejects it and then you will be able to make changes.