To Edit an invoice which is overdue, follow these steps:

Step 1: Head to the "Billing" section in the side navigation bar and choose "Invoice" from the list.

Step 2: After accessing the invoice section, you'll find an invoice status displayed for each invoice. Clicking on a specific invoice will open a new window containing an editable form.

Step 3: To initiate the invoice generation process, users can click the 'Generate & Send' button. Additionally, they can access a dropdown menu located at the top right, labeled 'Generate & Send', providing options to either 'Generate & Save' or 'Save as Draft'.