1. Use IRCTC mobile app to passenger details, then at the time of tatkal booking, those will be visible to select.
2. Login in IRCTC atleast 5 minutes before the tatkal booking window.
3. Open the required journey for tatkal, click on book now once the tatkal booking window opens.
4. Don't select any preference for seats.
5. Use UPI payments for the transactions.
Thanks Everyone booked it successfully.
@LG50 @UnderNation @myfungang829 @Rajkotian
Specially, @LG50 Thanks for mentioning every single step, if you would have not shared it, then I wouldn't have been able to book ticket.
Chose Razorpay & In phone UPI app ( Paytm) to make payment.