AutoAccounting Setup

Hi Experts,

I would like to know how to handle below.

Everyday we can record more invoices from Accounts Receivables and accounts defaults from Auto Accounting setup. We have setup auto accounting as below.

  Segment        Table Name                              Constant            

Company                                                           01

Department                                                        01 

Account           01

Future              00 .

But now also we want to create service related invoices. Should we change every time as Standard Lines for account segment  or any other option is there to enter both kind of invoices simultaneously?

Thanks