Tax calculation in order entry and invoicing

[Sajben@xxxxxxxxxxx]

BPCS version: 6.0.04 July 99, Client/Server

Did any of you met with the following problem? We have tax rate table,  and
tax rate code, properly set-up. If we enter invoices manually in cash and
memo posting, the tax is calculated properly. If we use order entry, having
the same customer (and the same customer tax code), and the same item tax
code, BPCS doesn't calculates the tax at all. The CLTAXA field is 0 in ECL,
and the HDTOT in ECH contains the order total wihtout tax. (The item tax
code and customer tax code fields are OK!). For the sake of the test we
updated ECH and ECL with SQL, did pick release and pick confirm, and
checked BBH and BBL. The tax fields (BTXAM in BBH and BLTA01 in BBL) ar
again zero.

Any idea, what to do?

Many thanks!
Klara