Importing Sales History
Importing of Sales History usually requires two files. Must have a header file that includes such information that is general to the sales invoice. Must have a detail file that has what you sold the customer i.e. Model Number, Serial Number, Cost, Price etc.

Header File Format:
Required Fields:

Invoice Number 
Invoice Date
Customer ID
Sold To Name
Sub Total Amount
Sales Tax Amount
Total Amount

Optional Fields:

Salesperson
Location
Billing Address
Billing City
Billing State
Billing Zip Code
Billing Phone
Billing Day Phone
Billing Fax
Ship To Name
Shipping Address
Shipping City
Shipping State
Shipping Zip Code
Shipping Method
Shipping Phone
Shipping Day Phone
Shipping Fax
Customer Po Number
Tax Exempt ID
Payment Terms
Payment Method

Detail File Format:
Required Fields:

Invoice Number (this MUST link to the Header File)
Model Number
Serial Number 

Optional Fields:

Qty
Description
Unit  Cost
Unit Price