YOU SAID:

Where did that come from?

INTO JAPANESE

それはどこから来たのですか。

BACK INTO ENGLISH

Where did it come from?

INTO JAPANESE

それはどこから来ましたの？

BACK INTO ENGLISH

In it came from where?

INTO JAPANESE

それがどこから来たか。

BACK INTO ENGLISH

Where is it coming from?

INTO JAPANESE

それがどこから来るのか。

BACK INTO ENGLISH

Where is it coming from?