I have a query (query A) that selects people, now off of that I have taken a few people who are in a different table (in query B).
Now I want to select the other within query A who are not within query B, I think I'm almost there I just need to know what the code is that I need to put into the criteria to get it to do this.

Thx

Use the Find UnMatched query wizard to find the records you want.

I cannot thank you enough, I've have spent weeks trying to figure that part of this database out, and when I did I ran into that problem,
Thaks for your help...

You're welcome.

Cheers for the last insite, but I got a new one, I need an update querry to update a check box to true but only if another check box on a Form is true.
What do I need to put into the Criterea box?

Assuming you want to do this for all records in a query or table, and not just the current record on a form:

Create a new query in design view and show the appropriate table/query(s) with the two checkboxes. Select 'Query-->Update Query' from the query design menu. Add the two yes/no fields to the grid. In the 'Criteria' box for the appropriate field, add 'True' (without quotes). In the field to be updated, put 'True' in the 'Update To' box.