Hi,
plz try the following solution, and hopefully it helps.
- in condition type maintenance, set the condition type for price (e.g., PR00) subject to manual update
- set pricing type of the pricing procedure to something like 'leave manual updated condition unchanged, and reprice others'
- in your case, tax is 7.4% of the price, so go to maintain corresponding condition record of that kind
with the above set, go for sales document entry, and go to condition tab in sales item, manually update the price, e.g., in your example, to 1000, and click update button, price value will remain unchanged and tax will be recalculated on that basis