How can I pay an invoice? Invoice payments are accepted via mailed check or online credit / debit card.To mail a payment, make the check payable to Tech Advantage and mail to:PO BOX 23008Washington, DC 20026To make a credit / debit card payment, visit https://TechAdvantage.co/pay and follow the on-screen prompts. Published 10/11/2020 4:02 pm