Hi @chidao , I can see you have Qty = 0 on the SO, so this is okay that your Line Dialog box is empty. You can do the following: 

• add line in Line Details dialog box (using “+” button) put Quantity and try to select Lot/Serial Nbr. 

  

   

OR

• add Qty on SO line first and then open Line Details for choosing Lot/Serial Nbr.

Hello @chidao. What version of Acumatica do you have? Am I understand correct, that you have customization(s) for SO301000 screen published in the system? 

Hello @chidao. thank you for the details. 

Could you please:

1. Inspect element Lot/Serial Nbr column n the Details tab of the Sales Order (SO301000) screen and show me Element Properties?
2. try Line Details dialog box for the line you need Lot/Serial to be selected. 

Hi @Julia Lukina, I use Acumatica Cloud ERP 2021 R2. There is no Customization Project for SO301000 Screen

I got this issue after I set up Construction Project - Cost & Budget Level by Task & Item Level

Below is our current process, please advise if you see anything wrong:

1. Create Project - set up Cost & Budget Level by Task & Item Level, add Item into Cost & Budget Tab
2. Add Project PO on PO Screen
3. Receipt PO on Purchase Receipt Screen with Warehouse, Location has been linked to that Project
4. Create SO and Shipment and link with the same Project, Warehouse, and Location.

Thanks for your advise!

Hi @Julia Lukina Kindly review my screen shot as below:

1. Element Properties

2. I have opened but it doesn't show