How to override the AX 2012 sales tax from 3rd party system using X++?

Most of the time we got the requirement to create Sales Orders in AX  (X++) using the input from the 3rd party system and in few case, we need to use the sales tax that is already calculated by the 3rd party financial system rather calculating it in AX. Here is the sample code which override the 3rd party sales tax rather use the AX sales tax calculation process.

2. After SO creation override the Sales tax provided by the 3rd party financial system.

 

After this if you want to check the sales tax , go to the invoice voucher and check the sales tax amount that has got invoice is equal to the 3rd party sales tax amount.