When the option used to Split tax ledger by tax rate, tax ledgers are created, such as CGST 5%, SGST 5% like that. This logic is common for both Purchase & Sales.
Some of the users, using prefixed with Input or Output in tax ledger for the convenience of tax computation in Tally.
To bring this facility in import, this features is used to add prefix word “Input” for all purchase type entries and “Output? for all sales type entries.