Invoice Split due to Tax Departure country and Number of Foreign Trade Data

Hello Friends,

With all the search I have done, this question was asked and answered a lot previously, but at the same time most of the previous solutions confuse me or didn't help me to solve the issue.

My issue is there is a invoice split for a sales order, yes its Order based Billing.

We had order combinations with two different plants before in the past and had no issues, but this plant is in abroad foreign country.

So I checked VTFA. ( order - billing copy control )  

Header:                                                                                                          Item:

Copy requirment          001   Header/order-related                                 Copying Requiremnets    002   Item / Order related

Determ.esport data      B                                                                         Data VBRK/VBRP              (Blank)

Assignment Number     E

Reference Number       A

The Billing split analysis shows as:

Split due to different header Data:

Fld Name                                          $000000001                                $000000002

Export indicator                                                                                   Z

Tax classification 1 for custo              1                                                0

Number of foreign trade data                                                              0000000667

Tax Departure Country                       US                                             NL

Please do offer advice and solutions. Thank you.