Here is a video tutorial on how to add the management fees module:
ManagementFee.mp4
The Management Fee module allows one to earn a fee calculated as a percentage of the total supply. The fee is accrued monthly (subject to gas costs) and can be paid in DEXTF tokens or fund tokens.

- Find a fund that you have created

- On the information bar, find the ‘Edit Button’ in the top right

- Click on the ‘Add optional module’

- Here you have the option to select which module to add, click ‘add module’

- This will take you to the Module settings.