I am a sophomore now. If you want to go to college after immigrating to the United States, do you have to take both TOEFL and SAT? What materials need to be prepared?

It depends on the school. Some schools stipulate that if you are a citizen, you don't have to take the TOEFL (but rarely, such as William and Mary). Some schools stipulate that you have to study in the United States for two years or more before you can take the TOEFL test. You can look at official website in the school, which has instructions. As for the SAT, some schools do not require it, but generally the top 30 or even the top 50 schools can still see it. You get 2200+ with Top30 and 2000+ with Top50.

In addition, if your school provides AP, you should try to take the SAT2, which is about two or three courses.

In addition to the above exams, you should also provide such materials:

1. School report card

2. Teacher's recommendation letter (usually two letters of recommendation from teachers and one letter of recommendation from the school education consultant).

3. Extracurricular activities

4. Awards and honors

5. Application documents

Some schools also require interviews. These are general materials.