[jack]

Note, the verb request takes a subjunctive verb (i.e., begin, not begins)

1. So 'request' takes a subjuntive verb because it is after the word 'to' (after the word 'to' you have to use the base word?) ? So do you mean this:
2. To request that email notification to begin, click "Request Change of Address" above.

3. To request that email notification begins, click "Request Change of Address" above. (So this is incorrect? Why the subject isn't 'email notification'?)

What's a subjuntive verb and imperative verb? How do you know if it is a subjuntive verb? Could you give me some examples? Thanks. Also, do you have a webpage that I could go to about 'subjunctive verb' and 'imperative verb'?

I don't get this. What's the difference in meaning between these two?
4. Also, do you have a webpage that I could go to about 'subjenctive verb'?
5. Also, do you have a webpage that I can go to about 'subjenctive verb'?