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https://help.tallysolutions.com/docs/te9rel51/Tax_India/Service_tax/Modifying_Tax_Details_in_Transactions.htm

Modifying Tax Details in Transactions

To modify tax details in transactions

1.     Click F12: Configure in the voucher.

2.     Set the option Allow modification of tax details for service tax? to Yes.

3.     Press Ctrl + A to save changes and return to voucher.

4.     Select the required sales ledger. The Sales Tax Allocation screen appears.

5.     Click F12: Configure. The Service Tax Details Configuration screen appears.  

o      Set the option Allow alteration of tax rate during entry? to Yes.

The Service Tax Allocation screen appears as shown below:

o      Select the Category.

o      Enter rate of Service Tax.

o      Enter rate of Education Cess, if required.

o      Enter rate of Secondary Education Cess, if required.

o      Enter rate of Swachh Bharat Cess.

6.     Press Ctrl + A to save.

Note: You can also view all the service tax details such as applicable from, category and others.