Custom Reports - Need field definitions

[SMoore]

I'm using the free version of Express Accounts with no support. I need to create some simple custom reports, but have found no documentation on the definitions of the fields in Express Accounts.

 

I'd like to create a Salesperson report where invoices are listed per Salesperson over a time period. This is similar to the stock "Salesperson Report" where Salespersons' sales are totaled, but details aren't listed.

 

Any help in directing me to the database field definition would be great!

 

Thanks in Advance.