In order to configure fees for subgroups, at least one member type must include Fee Control at the region, district or chapter level.
Navigate to the Control Panel > Club Tab > Setup > Organization Data.
Right-click the subgroup, then select Edit Membership Fees.
You will see the default fee and there is a field to specify a different fee for this chapter.
Click Save to save your changes and return to the Chapter hierarchy, or Cancel to return without saving.