When you create a "second level" league for a Country you will need to link the tournament of the "second league" with the tournament of the "first league" for creating promotions and relegations. I will show how to do it in this tutorial using the first and second leagues for Greece using two leagues that I have created previously. Start selecting the tournament page

and the first league

Now click on the button "Team 14" for changing the qualification rule

A dialogue box will open, select the "second league" and then the position that you want to qualify, in my case the winner of "B Ethniki"

Now, using the combo box just on the right of the rule description, select the team that has to play thi first year.

Complete the same job for the 3 promoted teams.

Now we have done the job for the first leage and we need to the same for the second league.

Now we have to change the rule for "Team 1"

This time we will select the 14th classified of the "first league"

Again select the team that has to play the first year, then do the same for Team 2 and Team 3, this will be the final result: