Can I edit the net terms for individual accounts?

Yes, you do have the option to edit the net terms for individual accounts if needed. To do this when you are in the account that is associated with the manually collected subscription go to options then, edit subscription in the subscription table of the account. In the edit view, towards the bottom, you will see the dropdown menu to configure the net terms as needed for the account. Note that the new terms will apply to invoices that are generated moving forward.