You can record the opening balance for your VAT account by debiting the VAT ledger and crediting the current assets ledger.
1. Go to Gateway of Tally > Accounting Vouchers > F7: Journal .
2. Click J : Stat Adjustment .
3. Select Opening Balance as the Nature of adjustment .
4. Press Enter to return to journal voucher.
5. Debit the VAT ledger.
6. Credit the current asset ledger.
7. Press Ctrl+A to accept the voucher.