I appreciate your interest in splitting a credit card expense entry in QuickBooks Desktop (QBDT), Mr. White. Let me address your concern by laying out the details below.
In QBDT, there isn't an option that allows you to split an expense and set up automatic percentage allocations for it or any other transactions. However, you can achieve this by manually entering the amounts based on the percentages you desire.
In addition, you'll want to organize your bank feeds by checking out this handy reference: Add and match Bank Feed transactions in QuickBooks Desktop.
Moreover, here is an article for your future reference about reconciling accounts in QBDT. It includes complete instructions to ensure everything is properly recorded.
We're all ears for any further assistance you might need with managing expenses or other transactions and business accounts. Please post your questions in this thread. We'll be ready to assist you, Mr. White.