SAT

Hi,
For SAT, you need to register at collegeboard.org and for IELTS, following link will guide you further:
https://www.ielts.org
Once you register, you can choose the centres as per your convenience as they have several options available.

Hi
Admissions to Singapore University is completely based on academic rigor and SAT so you need to score as much as possible in both, ICSE and SAT. Other requirements can be accessed here:
http://admissions.ntu.edu.sg/UndergraduateIntnlAdmissions/Pages/InternationalOthers.aspx

Hi,
Start preparing your application process including taking these tests a year before the admission sessions. You can schedule the tests accordingly. Visit university websites for upcoming deadlines and prepare.

Hi,
There is no set eligibility but to take SAT or ACT, you must be a high school student as these tests are given to study Bachelor degree. For TOEFL, there is no such requirement.

Hi,
You can take your SAT. Where do you want to study? Not every country requires the SAT. So, first, you decide what and where to study and then consider taking the SAT.

Hi Arpit,
To study Bachelor degree in USA, you must take the SAT or ACT and TOEFL. If you don't plan to take these tests, you are not eligible to study in the States. You have to start the admission process a year ahead of the admission season. So, prepare accordingly and apply accordingly.

Hi Naman,
Both are entirely different tests. SAT is more of aptitude abd reasoning test while JEE is for engineering programs. Yes, the JEE preparation will only help you with the mathematics section but not wholly as the formats are different.

You need a CGPA of 4 and higher to apply to ivy leagues. Your overall profile that includes co-curricular, sports, community services, etc. should also be impressive.

Take a sample test on any of the free test sites and check your level. if you need preparation, you may join any of the classes mentioned by you to score high.

Hi,
You have to apply to the universities through common app or individually. Your SAT/ACT scores are sent directly by the respective agencies. With your application you will be required to submit your high school transcript, letter of recommendations from principal/counselor and teacher, an essay or Statement of purpose, etc.