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The phrasal verbs
turn off and
switch off are separable, so both forms are acceptable:
turn off something <never, turn off
it>
switch off something <never, switch off
it>
turn something
off switch something
off
If, however, the verb's object is fairly long, as in example 4), it's best not to separate the phrasal verb. It's not a rule. It's just being kind to your reader.
4) Click here to
turn off the ....
Read more here:
What are Phrasal Verbs? - Phrasal Verbs Explained for ESL Students http://www.usingenglish.com/reference/phrasal-verbs/