If you win the lottery jackpot in Germany you have not to pay tax.
Lottery winnings aren’t susceptible to German tax since they’re not among the causes of earnings enumerated within the tax statute.
Lotteries, legal betting and casinos are taxed at source in Germany (lottery providers, bookies and casinos need to pay a portion of the turnover, based on statute, towards the federal condition they’re in), so there’s you don’t need to tax winnings – with taxing at source there’s significantly less scope for fraud.