How do I fix KSEF-008?

Assign GTU codes to products that require them. Invoice Navigator detects this error and prompts for the required business data before applying a safe fix.

Is KSEF-008 a critical error?

KSEF-008 is a warning that may not always cause rejection, but it indicates a potential compliance issue that should be addressed to ensure full compatibility.

Can KSEF-008 be automatically fixed?

KSEF-008 requires specific business data to resolve. Invoice Navigator detects the error and guides you through providing the needed information, then applies the fix with full audit documentation.

Error codes · KSeF · Poland

KSEF-008Fixable here

GTU code missing

This is the rejection, word for word: „[KSEF-008] Certain goods/services require GTU (Grupy Towarów i Usług) classification codes. Required for alcohol (GTU_01), fuel (GTU_02), heating oil (GTU_03), tobacco (GTU_04), and other specific categories.“

What to have readyGTU Classification Code

What we doAssign GTU codes to products that require them.

Choose the rejected invoiceor drop it here

XRechnung XML or ZUGFeRD PDF. Checking is free · corrected file €1.90 · the first every 30 days is free · no sign-up.

What the finding looks likeExample

FindingValue missing · KSEF-008

From youGTU Classification Code

ThenPassed

ProofSHA-256 and /verify link after the check