Copy notes from project revenue budget line to invoice notes

​@MarkD No, Business Events are not suitable for this. But  it is possible only via
1.Customization on BillingProcess graph extention.
 

2️.Intercept invoice line creation

Look into:

PMTran creation

OR ARTran insertion (preferred)

At this point, Acumatica still knows:

Project

Task

Cost Code

Inventory

Revenue Budget Line

3.Locate the Revenue Budget line

Query:

PMRevenueBudget
Matching on:

ProjectID

TaskID

CostCodeID

InventoryID

This is deterministic during billing.

4️.Copy the Note

Use Acumatica’s Note API To Copies notes only

PXNoteAttribute.CopyNoteAndFiles(
    sourceCache,
    revenueBudgetRow,
    targetCache,
    arTranRow,
    copyFiles: false,
    copyNotes: true
);

Including Files Use below code
PXNoteAttribute.CopyNoteAndFiles(
    sourceCache,
    revenueBudgetRow,
    targetCache,
    arTranRow,
    copyFiles: true,
    copyNotes: true
);