What do I need for KPRA (Khyber Pakhtunkhwa)?
Your NTN, the POS ID and the key that KPRA issued.
KPRA issues a POS ID and an authentication key for each registered counter (posregistration.kpra.gov.pk). Enter them with your NTN in POS Settings › Add a counter › Khyber Pakhtunkhwa.
KPRA works with invoice totals and one tax rate per invoice: use the same tax % on every item of an invoice. KPRA has no public test system: use a practice counter to learn first.