How do I start an audit for a year end?

Accounts → Audit (/accounts/audit-runs) → New run: pick the year end, a label, the audit firm and contact (last year's are offered). Every company with a Xero connection joins the run; ones not audited can be switched off later. Prepare pulls Xero's year-end reports verbatim (trial balance, P&L, balance sheet, aged listings), the bank statements Xero holds and the payment history since — and runs by itself every night for every open run. The Next card on Overview names the one thing to do now. Audit runs sit at the Standard tier.