https://help.tallysolutions.com/docs/te9rel66/Advanced_Features/Advanced_Inventory_Features/Sales_Voucher_for_Job_Costing.htm

Allocate Costs to Projects (Sales)

Cost can be allocated to projects when recording a sales entry.

1. Gateway of Tally > Accounting Vouchers > F8: Sales .

2. Debit the Customer ledger and enter the amount.

3. Credit the Sales ledger.

4. Select the Cost Centre and enter the Amount.

5. Press Enter to save the transaction.

Note: When sales transaction is recorded in an Item Invoice, the details will be available under Cost of Sales in the Job Work Analysis - Consumption report.