I'm glad you're contacting us on the Community for support with this. I can appreciate that you'd like to connect your PC Financial card to QuickBooks Self-Employed.
Our engineers are aware of an ongoing connection blockage between PC Financial and QuickBooks Online/Self-Employed. This financial institution doesn't properly connect with Intuit products at this time. Here's more information about this: https://community.intuit.com/announcements/1815063.