You may pay an outstanding invoices via credit card or PayPal account. You do not need a PayPal account to make a payment but an email address is required for your receipt. HELPFUL HINT: Choose the yellow PayPal Checkout button at checkout to bypass using a PayPal account.
To ensure your payment is applied properly, enter your Client ID(s) when prompted. Client ID numbers are located on the lower left portion of your invoice, as well as the upper left corner of your tax return.