Different versions of QuickBooks treat imported invoices differently, but no matter which version you have, you can see your invoices on the Sales By Customer Detail report when you choose to list all in the appropriate date range. You can then open the individual invoice by double-clicking on it in the report.
If you ever get an "Error on line #" error message while performing the import, then it means it is not importing that transaction, so it may be that if you can't find a particular invoice, then it is because of that. You will need to open the file you exported from Camelot (e.g. CETRANS.IIF) in MS Excel and go to the line number to find out which transaction did not import, so that you fix the problem and redo the post.
