Steps for importing invoices

Hi,

This is the first time i am importing invoices in SAP-B1.

Can anybody guide me how to go ahead with this step by step.There are 2 templates one is document and the other is document lines.how to define the link between these two templates?

I am using segmentation accounts.Can i use the format code in the account code field?

If i want to upload as service invoice,what do i need to do?

Please help.

Thank You

Regards

Md.nazeer Shaikh