This document discusses how to create a reverse charge mechanism (RCM) tax code in SAP Business One. The RCM tax code is needed when tax needs to be paid to tax authorities without being charged to the service provider. The steps include creating reverse tax types, a separate tax category, tax attributes for different rates, and ensuring tax amounts are multiplied by -1 in the tax formula. An example journal entry illustrates using the RCM tax code where service tax is deducted and credited to the vendor but also debited as an expense and credited as a payable to the tax authorities.