I am in class 10 and wants to prepare for the exam. and also want to do my registration, then how to do that?

Relax the night before the test. Don't cram. ...
Rely on the strategies you've learned through SAT test prep. ...
Evidence-Based Writing. ...
Evidence-Based Reading: Reading Comprehension. ...
Evidence-Based Writing: Multiple-Choice Questions. ...
Math: Multiple-Choice Questions.
You can register online via the College Board website. You will need to create a free profile, state where you would like to take the test in the U.S., select a test date, and enroll in the test date. If you would like to register by mail, you must get an SATPaper Registration Guide from your school's guidance office.