7961f0d2___Accounting_and_ERP_Solutions__Availability
[Windows] ALT + 2 [Functionality] To Duplicate a voucher [Availability] 
At List of Vouchers – creates a voucher similar to the one where you positioned the cursor and used this key combination
Short-cut keys or keyboard shortcuts available in Tally ERP9 | TallyDirect - Accounting and ERP Solutions
Availability