In order to pay for services used at MyWordPress (no matter if you are a Reseller or Agency), you will need to setup
a card payment during the checkout process, which will also be used for future payments.
You can review pricing tiers and requirements on the website.
MyWordPress does not take any additional transaction fees when paying for services rendered for the previous month. For
more information, review the fees section in Getting Paid.
To review your pending invoices, click on the left-hand Invoices menu item:

To make a payment, click on the Make Payment button, which will begin the checkout process:

You will now begin the Stripe checkout process, which you must complete in order to mark the invoice as paid (not shown):

Once you fill out your information, click on the Pay button to process payment. Once processed, you will land back
on the Invoices page, with the Invoice marked as Paid.