SAP Note 13373 - Master record requires tax classification

Symptom:

When you release a billing document to financial accounting, the system issues error message FM 214:
'Master record of account xxxxx requires a tax classification'

Cause and prerequisites

A tax classification has not been assigned to a condition.

Solution
1. Check whether the G/L account requires a tax classification.

2. Please check, in Customizing, whether the corresponding tax
condition (e.g. VAT) in the assigned pricing procedure "fulfills"
ALL the conditions subject to tax that appear.
- In the billing document, EVERY condition must carry a G/L account
and a tax classification before the tax condition (check with
the detail function on the condition data screen).
- No tax-relevant conditions may be blocked out in the pricing
procedure (by providing the base level 'from level ... to level').

3. Check whether the billing type has been assigned a
revenue account key. In this case, only EVV (cash clearing
W I T H O U T tax key) and not ERL (revenue account W I T H
tax key) can be assigned.
The account which the system determines via the tax key does not
appear in the current account determination analysis.

Key word: Tax classification