Какую настройку сделать для арифметического действия таблиц T007K/T007L для того , чтобы по налоговому агенту
в книге продаж отразилась БЕ в поле покупатель и база суммы НДС.

Если ставлю арифметическое действие "-" , то отображается БЕ, а база НДС - 0
Если ставлю "B" или пусто, то отражается база и не отражается БЕ.

Извините, что будет на английском, просто есть под рукой.
Sales and Purchase Ledgers customizing
To get the correct amounts in Sales and Purchase Ledgers you should do the customization of T007K and T007L tables. Customizing of these tables must be identical. Sales Ledger is customized using tax grouping version 'SAL'. Purchase Ledger is customized using tax grouping version 'PUR'.
When OPERA is empty, then the tax base (HWBAS) is shown in "Total Purchase without VAT" or "Total Sales without VAT" columns (18%, 10%, 0%, 20%, non vatable), the tax amount (HWSTE) is shown in appropriate "VAT" columns. Total Payment / Sales amount is calculated as a sum of tax base and tax amount.
You could assign the following values to OPERA:
- - relevant for downpayments, address data is taken from company code, base amount is not printed.
P - relevant for downpayments, address data is taken from partner data in opposite to '-', base amount is not printed.
+ - tax base amount is calculated as a sum of tax base and tax amount.
B - ignore data in table DEFTAX_ITEM (solution for deferred taxes), use tax base and amounts from BSET.
G - payment amount is equal to base only (HWBAS) (by default the payment amount is equal to sum of base and tax).
T - payment amount is equal to tax only (HWSTE) (by default the payment amount is equal to sum of base and tax), can be used in payments to customs or tax offices.
N - change sign of all amounts (base, tax, payment) to opposite, can be used for budget payments (e.g. payments for rent).
V - print company name, INN and KPP in partner columns (tax agents)

Есть ощущение, что Вам подойдет 'V'.

спасибо