You need to run an UPDATE query on the main database based on related, matching, records (by field name or some key that makes sense) from the newly created table with faxes to be invalidated.
Link the two tables and take it from there through Access Help. Do run trial runs without updating initially.
You may want to add a field to your first, main table where you can flag items which are not current. Unless you plan to delete the records in the first place. There are many ways to skin a cat.
Anyway, Run Access Help for "Update query", and then see their topic "Update one table based on another table". Have fun