When creating your own Task Force, the default size will always be 5 members.
If you wish, you can increase the member count to 10, 25 or 50 members. You can do so by tapping on the little green "+" icon in the Task Force info screen.
But remember: You can only upscale the size of a Task Force but you can never downsize it! This means, that if you decide to increase your max member count to e.g. 50 you can not reduce it back to 25, 10 or 5 members.
If you find that your Task Force is too large, we recommend making a new one that might better suit your needs.
In case you wonder why we don’t allow reducing the size: Task Forces with more members can beat more difficult Power Bases and therefore gain more Task Force Points. If a 50 member Task Force would reduce its size to 5 members it would suddenly appear on the leading position of the Leaderboard for Task Forces with max 5 members and others could never catch up with it.