Firstly, you need to create a credit card account in the bank ledger, by selecting Set Up>Accounts>Bank>New.
You can then enter transactions from your credit card statement in one batch using the P+R transaction and selecting the credit card account as the bank account.
Alternatively you can import transactions from a credit card statement using the Universal Input Sheet - see Importing a credit card statement
If any of the transactions are in a foreign currency or require more complex VAT treatment than standard UK input VAT (e.g. reverse charge VAT) then you need to use the PAY transaction.