'Tax details does not exist for Item No 1' error on External Supplier Invoices window

Hi ​@PathiranaPeshala ,

This is a known behavior in IFS Cloud External Supplier Invoice load process, especially when the Supplier ID is initially invalid and then corrected.

 Root Cause

From your scenario:

1. Invoice is loaded with incorrect / non-existing Supplier ID ❌
2. System creates invoice header/lines partially
3. You correct Supplier ID later

4. Error appears:

   Tax details does not exist for Item No 1

 Reason:

Tax calculation does not re-trigger automatically after correcting Supplier ID

 Why it works on second load

When you reload the same dataset:

• Supplier is already valid ✅
• System performs:
  • Tax code derivation
  • Tax calculation

 So tax lines are created correctly

 Key Behavior

IFS External Invoice Load:

• Tax is calculated:
  • During initial load
• If master data (like Supplier) is wrong:
  • Tax step is skipped
• Later corrections:
  • Do NOT trigger recalculation

 How to Fix

 Option 1: Re-trigger Tax Calculation (Manual)

After correcting Supplier:

• Open invoice line
• Use:
  • Recalculate Tax (if available)
  • Or update line (trigger recalculation)

 Option 2: Reload the Invoice (Cleanest)

Best practice:

• Delete incorrect invoice
• Reload with correct Supplier ID

 Ensures:

• Full process executes properly

 Option 3: Ensure Correct Data Before Load (Recommended)

Validate before sending:

• Supplier ID exists
• Tax setup is valid

 Avoids partial processing

 Option 4: Custom Event (Advanced)

You can implement:

• Event on:
  • Supplier change
• Trigger:
  • Tax recalculation

 Important Insight

External Supplier Invoice load is not fully dynamic

 It behaves like:

• One-time processing
• Not reactive to later corrections