I am not sure you were wondering how to use integration - but i do recommend it. Still - i think the following might be the answer you are looking for.... If you use a third party, non-integrated merchant processor and you wish be able to simply choose the card type to record the sale by credit card, it is likely that the payments settings in the setup interview are set incorrectly.
Go to File>Setup Interview
Click on the payments tab
Under Would you like to accept credit and debit cards, select "No"
Click the Done button
Now when you go the make a sale screen, instead of getting prompted for the login you should be able select credit and be able to record the credit card method and amount processed from your external system.
... View more