Type search words and press enter
"Use Edit Log for transactions/masters, and digital signature for invoices/reports with Release 2.1. Download NOW!"
https://help.tallysolutions.com/docs/te9rel49/03_VOUCHER_ENTRY_IN_TALLY/04_Order_Processing/Enabling_Order_Processing.htm

Enabling Order Processing

To enable Purchase Order, Sales Order and Job Order Processing in Tally.ERP 9, activate the following in F11: Features (F2: Inventory Features)

Set Allow Purchase Order Processing, Allow Sales Order Processing and Job Order Processing to Yes in the Order Processing section.

Note: When Allow Job Order Processing is set to Yes, the options Maintain Multiple Godowns and Use Material In/Out get enabled automatically.