HI @nawanjanahansamali50 

I could not get it to add a Non-Stock item either. According to the help, you should be able to:

The inventory ID of an existing or new inventory item. In the box, you can select a stock or non-stock item or type the ID of the new item that will be regarded as non-inventory. You can change the inventory ID in an estimate at any time; that is, you can enter a new inventory ID or select a different stock or non-stock item.

Have you asked Acumatica? 

Hi,

Although Acumatica guide provides guidance that we can select a stock item or non stock item in estimations in Opportunity form, I can’t select a non stock item there.

Hi @nawanjanahansamali50  I just reviewed the code of this DAC field.

By default Acumatica is allowing ONLY STOCK ITEMS.

If you wanted to add the Non-Stock Item, then you need to customize below

1. Create a Graph Extension file
2. Add a Cache_Attached code for this field in the graph extension file.
3. Decorate the Cache_Attached with PXRemoveBaseAttribute with PXRestrictor.
4. Then this field shows the Non Stock Items

Hi @Naveen Boga,

Thank you so much for your prompt attention regarding my matter.

Thank you