Since you are already in a school in the US, I believe that your English grade is sufficient and you don't need to take the TOEFL. That is unless your English grade is not good then you might have to consider doing that. As for the SSAT, some schools will want it but some might waive that. When my daughter transferred from PEA to Milton, she didn't have to take the SSAT again since she already took one the year before.
Your chances are much better transferring from a US school to another US school. But the percentage depends on which school you are applying to.
Rosie
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