why the entry for tax is not appearing in TBB1 in "test mode"

Hello Experts,

I hv created a Fixed Term Deposit transaction by using T-code TM01 with Product type-51A & transaction type-200 .Tax informations for Business Partner are maintained .I hv settled the transaction .While running the TBB1 in "test mode " it is showing

Dr      Interest on public deposit

Cr     Business partner

Here it doesnot show any entry for Tax.

But with Actual run (test mode NOT tick) , It post entry for tax also.

Would any expert through light why the entry for tax is not appearing in TBB1 in "test mode" while it is appearing in actual run (test mode NOT tick)

Thnx in advance

Warm Regards

Satendra Singh Sikarwar