You only get two changes, if the user hasn't been active in 5 months then you may take their name.
Banned users do not count.
To change your username, do the following -
If this is the first name change, [First username] - [New username]
If this is the second name change, [First username], [Last username] - [New username]
Banned users do not count.
To change your username, do the following -
If this is the first name change, [First username] - [New username]
If this is the second name change, [First username], [Last username] - [New username]