https://help.tallysolutions.com/docs/te9rel64/Voucher_Entry/Accounting_Vouchers/Income_Account_Sale_Vch.htm

Voucher Entry Configuration- Allow Income Accounts in Sales Vouchers

Generally, all the Sales made by the Company are recorded using Sales Voucher.  In certain cases, the user would like to record the Income ledgers also in the Sales Voucher, the same is possible by enabling the option Allow Income Accounts in Sales Vouchers in F12 configuration in voucher mode.

For Example, pass a sales entry towards Professional Income from Customer A.

1. Debit Customer A Account.

2. Credit Professional Income Account grouped under Indirect Income.

Note: 1. On enabling Allow Income Accounts in Sales Vouchers the Income ledger will be available for selection in voucher mode for credit in the second line.

2. In invoice mode the income ledger will be available for Accounting allocation and also as additional ledger.