False, you need a comma if an independent clause is connected to a dependent clause with a subordinating conjunction if the dependent clause comes second. However, if the dependent clause comes first, then you do not need a comma. Here's an example:
Because (subordinating conjunction) it was Halloween (dependent clause), (comma) I dressed up as a witch (independent clause).
OR
I dressed up as a witch (independent clause) because (subordinating conjunction) it was Halloween (dependent clause).
Hope this helps!
