You can now make payments towards your chapter bills through mySigEp. Once in mySigEp, choose your chapter from the top right corner and select the "Statement" icon. From there, you'll find SigEp Headquarters maintains a Statement of Accounts for each chapter and AVC. It is similar to a credit card statement that shows all of the account's financial transactions and invoices.
An example Statement of Accounts and invoice is shown below: