Here’s a clear explanation of Tata Sierra “booking details” (I think you meant booking rather than blocking — if you meant something else like blocky design, let me know!):

📌 Tata Sierra Booking Details (2025 Model)

🚗 Official Bookings

• Tata Sierra bookings opened in mid-December 2025 at authorised Tata Motors dealerships and online. The Times of India

• Dealers had also started unofficial bookings earlier by taking token amounts (~₹21,000) to reserve customer interest before the centralised booking launch. Cartoq

🗓 Booking Timeline

• Centralised bookings started around December 16, 2025. The Times of India

• Deliveries are being planned from mid-January 2026. The Times of India

📊 Demand & Response

• Tata received over 70,000 confirmed bookings within the first 24 hours of official openings. Navbharat Times

• A further ~1.35 lakh customers showed interest in specific variants and choices. Navbharat Times

💰 Booking Amount

• Booking amounts are typical of Tata Motors practices — often refundable and specific to variant choice. Although Tata has not published a centralised booking fee, dealer token amounts have been around ₹21,000. Cartoq

📝 How Bookings Work

1. Payment of Token/Earnest Amount
   Through Tata Motors’ official site or dealer — usually a small refundable amount.

2. Confirm Variant / Powertrain Choice
   You select petrol/diesel and manual/automatic soon after token payment.

3. Final Payment on Booking Confirmation
   After official pricing, you pay the remaining booking amount & get delivery scheduling.

4. Delivery
   Scheduled from around Jan 15, 2026, depending on stock and location. The Times of India

📍 Tip: Before Booking

✔️ Ask the dealer exactly what amount is refundable if you cancel.
✔️ Confirm variant, fuel type, and transmission — as demand is high and allocations can vary.