Directly entering service tax amount

Here I have to add Service tax amount of Rs. 150/-. That I don't want to do.

Once I enter Planning work amount of Rs. 1000

and then on selecting "service tax", the amount of Rs. 150/- should be written down automatically

That is all I want

New bees not deserve to have a single reply even?

It's always better to open a liability a/c viz., service tax payable and a/c service tax related items can be given shelter under the head. The reason is at one point of time we can know how much Service Tax paid Vs collected