How do I add the Apple Card to QuickBooks?

You cannot import Apple Card data into any accounting program for now. You can submit feedback if that is something you would like to see in the future.

Product Feedback - Apple

Need to be able to import Apple card transaction information to Quickbooks, The manually adding of transactions is so 1990. Get with it Apple.

1. Go to Settings > [your name] > iTunes & App Store.
2. ​Tap your Apple ID, then tap View Apple ID. You might be asked to sign in.
3. Tap Payment Information.
4. Edit your payment information to add your Apple Card. Then tap. Done.

Then you should be able to use it for the quick books app.

Submit feedback and maybe they would consider adding it as an option at a later time.

You're not talking to Apple.