Sales tax has 3 terms No. 1- input tax 2. Output tax & 3 net
Tax If the company has purchased materials from within the
State that tax given is considered as input tax and if
Company has sold materials within the state or outside the
State and charged the tax rate then it considered as output
Tax.Interstate sale is considered as CST Sales.

And if company has purchased some materials from interstate
Then it should not be considered as input tax it considered
As CST purchase and again if company has purchased some
Capital goods for their own use then also the tax paid is
Not considered as input tax whatever tax given is considered
As purchase value of that particular materials.

Calculation of net tax payable

Output local tax 100
Cst sales 200
Total 300
Less input tax 150
total 150

This 150 should be filed on or before 20 of every month
If total tax is payable, nil, or refundable, the above
Calculation should be done in form no 100 and filed in the
Concerned sales tax department on or before 20th of every
Month that form 100 should be 1 1

How to take service tax for part payment