Tax Calculation is not updated using BAPI in FICO

I am using BAPI_ACC_GL_POSTING_POST where I am posting G/L Documents but when I have tax related information I am not able to see the tax related information for this document.

I have passed the Tax Code and Tax indicator to the respective structures of BAPI but still not able to find the tax line item after getting posted I tried with one more bapi also [BAPI_ACC_DOCUMENT_POST] here also the same I am not able to see the tax line item Could anyone please help me in this.

Regards

Amit.