To say "go back to school" in Engpsh, you can use the phrase "return to school." For example:
"I miss my friends and teachers, and I'm ready to return to school."
You can also say "go back to school" by using the verb "go" instead of "return":
"I can't wait to go back to school and see my classmates again."
If you want to specify a specific time in the past when you went to school, you can use the past tense of the verb "go" or "return." For example:
"I went back to school last month after the summer break."
"I returned to school in September after a long summer vacation."