The Turbo Visa prepaid card is typically delivered within 5-10 business days of signing up; the FAQ below provides further details:
https://ttlc.intuit.com/community/refunds/help/when-will-i-receive-my-turbo-prepaid-visa-card/00/27306
If it has been longer than the outlined time frame, you may contact card support here: https://turbodebitcard.intuit.com/