You have to enable GST features in Tally.ERP9 to record GST related transactions. After activation of GST for your company, then all GST related features are available for ledgers, stock items, transactions and you can generate GST returns as well.
Open a company in Tally.ERP9 for which company you want to enable GST features.
Click on F11 Features from Gateway of Tally screen and click on Statutory & Taxation.
Enable Goods and Service Tax (GST): Yes
Set/Alter GST details: Yes, once enable this option then the below screen will appear
Registration type: Regular
GSTIN/UIN: You have to specify your company GSTIN number and this will appear on invoices and reports.
Applicable from: By default it will display GST applicable from 1st July 2017
Enable tax liability on advance receipts: Activate “Yes” to calculate tax liability on advance receipt.
Enable tax liability on reverse charge: Activate “Yes” to calculate tax liability for reverse charge on URD purchases.