Can I restart numbering at 1?

Quick answerIn 2 steps

  1. No: within a financial year numbers only move forward. “Set next…” in Settings → Documents & series can skip ahead, never back.

  2. Each new financial year starts its own sequence — the year is part of the bill number.

WhereSettings → Documents & series in the back office

Also asked as

  • “reset invoice number”
  • “start bill numbers again”