You can account for labour charges paid as a separate interstate sales transaction by selecting the nature of transaction Interstate Labour Charges Collected .
This nature of transaction is provided for Andhra Pradesh, Assam, Dadra & Nagar Haveli and Daman & Diu, Delhi, Jharkhand, Karnataka, Maharashtra, Odisha, Punjab, Rajasthan, Tamil Nadu, Telangana, and Uttar Pradesh.
1. Go to Gateway of Tally > Accounting Vouchers > F8: Sales .
2. Enter the Reference no.
3. Select the party ledger in the field Party's A/c Name .
4. Select the sales ledger grouped under Sales Accounts with Nature of transaction set to Interstate Labour Charges Collected .
5. Press Enter to save.
The value of this transaction gets captured in the relevant fields of state-specific VAT/CST forms and annexures.