1.                  Go to Gateway of Tally > Inventory Info. > Stock Items > Alter > select the item.

2.                  Press F12, and set the option Use alternate units for stock items? to Yes, so that you can map alternate units to the reporting UQC.

[Selecting the report UQC for an item, in case it has multiple UQC's linked, is also made easy in Tally.ERP 9. ]

3.                   Select the unit.

4.                  In Alternate units, select the unit or press Alt+C to create a new unit.

o                    In the Unit Creation screen, select the Unit Quantity Code (UQC) from the List of UQCs.

o                    Press Ctrl+A to accept.

5.                   In the Stock Item Alteration screen, select the Reporting UQC.

6.                  Press Ctrl+A to accept.