Handling old invoices paid by a credit card

Hello Everyone

I am a project manager who has just been hired by a small engineering firm as both project manager and general manager. The owner hasn't had a bookkeeper all year but used QB 2003 Pro for last year. He and I both want to use it for this year. Not being a bookkeeper I'm learning in a hurry.

Here is my situation: We purchase a lot of stuff using a credit card. I have a lot of such paid invoices requiring input. My current approach is to use the Write Checks function placing the it in the appropriate account (we have a rudimentary COA).

Here are my questions.

1. Should I also create a corresponding entry in the Vendor Navigator/Enter Bills screen?
2. The Vendor Navigator/Pay Bills screen shows the invoices I have entered. How do I clear that screen?

I know to an experienced bookkeeper, these are simple beginner questions. I'm enrolled in a course starting next month at the local community college. Until then I need some advice.

Many thanks

Jeff Williams