Selecting Criteria in a Report

Here's the deal. I have set up a database to track all the proposals I send out of my office. My boss has asked me to submit a report to our A/R Dept. on all proposals that have lead to an order. How do I tell my report to pull only those customers? The field that I need it to look at is named "Bill Date".
Any help,would be greatly appreciated. I am baffeled!

Thanks,

Shawn

If I have understood the problem OK then I suggest running the report from a query that on returns those records with a bill date (Is Not Null) - Hope this helps!