Total your 12 monthly P2 returns, compare to the year-end ITF 16, and see whether to amend a prior P2, settle in next month's P2, or wait for ITF 16 to absorb the variance.
All figures USD (or single-currency equivalent). For dual-currency reconciliations, run this once for each stream.
Pull PAYE + AIDS levy from each P2 return as filed.
Apply the annual PAYE table (USD bands × 12) to total annual taxable income, less annual credits and exemptions.
Variance = ITF 16 PAYE − (P2 total − credits)
Small variance (<3%): catch up in next month's P2. Larger: amend prior P2s. Material: file ITF 16 with full explanation.
If P2s under-paid, balance due. If over-paid, refund or carry-forward via ITF 16.