SAP Note 10752 - Error message FS218 issued during posting.

Symptom

Error message E218 during posting:
Tax indicator must be an indicator from the G/L account

Cause and prerequisites

A different tax indicator (BSEG-MWSKZ) is issued in the posting
line than is allowed in the G/L account master (SKB1-MWSKZ).
This could have the following possible causes (in addition to
an incorrect account assignment):
1. The tax category setting of the G/L account master is wrong
2. Tax category determination for billing documents (VF02) is
wrong in SD (VK12).

Solution
Check the Customizing values, correct if necessary.

The tax indicator from the billing is determined as follows: VK12
- Tax classification of consignee (customer master record)
- Tax classification of the material
- Country key of customer

Key word: FS218