Turnover and sales difference

It depends on context you are talking:-

Ist

Sales = Turnover - Discounts (if any) - Taxes related to
production.

In a more understandable way, turnover is the gross sales,
which includes Discounts and Taxes related to that
particular product/service.

*Discounts include Trade Discounts
*Taxes include Turnover taxes etc.,

IInd

A sale is the pinnacle activity involved in selling products in return for money

The word "Turnover" has many meanings.

For a trader/manufacturer it means total sales (cash+credit).

While for a service provider the gross receipts form the services provided is its turnover