Adding subtasks into other subtasks

Hello @Katie_Seals

Welcome to the forum. Here is what to do:
Task
Sub task 1
Subtask 2

You need to move subtask 1 to become a subtask of subtask 2 - so you ultimately want:
Task 1
Subtask 2
Subtask 2.1 (which used to be subtask 1)

If the above is correct, then click on subtask 1 so the panel is open on the right handside
Click on the three dots at the corner,
select conversation to and 2 options will appear for you, one of which is convert to subtask

Once you click on it, Subtask 2 option will appear at the top as it is in the same project.

Hope this helps