Purchasing (PO) configuration question

Hello Purchasing/ MM Experts,

I am a CO Functional for many years. I am setting up Purchasing for this SMB customer. No IM, just a vanilla Purchasing functionality is needed here. Create PR -> do the PO -> do the standard GR/IR and Invoice verification. They need POs for Consulting/ Professional services, not for Materials.

I am using SAP standard PO type NB. When I create PR and create a PO with reference to that, the indicator "GR" is selected by default. The GR is Not applicable for the type of PO we are doing here. I have tried the configuration for Define Screen Layout, but the line has entry gor GR/IR Indicator. When I suppress that the IR also goes away (which means, I can not do IR and verfification against PO). What we need is default setting of "GR" not selected and "IR" selected when PO is created. we do not want the user to manually de select the "GR" indicator since that field is not applicable to their PO's.

Any suggestionss from MM/ Purchasing experts greatly appreciated to default this through configuration adjustment.

Thanks,

Krish