1) Choose Add Manager.
2) In the team option, choose 'Choose from the list'.
3) Click on any team.
4) Click on an English player in the team.
5) Click on England in the player's profile.
6) Click on 'Take control'.
7) You will then be appointed as the National Team's manager without the need to earn it.
8) The same trick can be done for any league and any country.