To manage the credit card, you will need to create two accounts: "Credit Card" and "Bank". Record all your expenses made by credit card on the account "Credit Card" and when the monthly cost of your credit card is charged to your bank account, create a transfer with the following details:
- Amount: monthly expenditure of the credit card (do not add the bank charges)
- Withdrawal account: Bank
- Deposit account: Credit card
- Date: date of charge
- Description: Charge credit card
If you have a bank commission for the charge, you just need to create an expenses of amount of bank charges on the Bank account.