Step 1: Understand the question.
Where can impeachment of the President be started?
Step 2: Recall Article 61.
Article 61 sets out the impeachment of the President for violating the Constitution.
Step 3: Find where it can begin.
The charge can be brought in either House of Parliament. It does not need a joint sitting to begin.
Step 4: Note the procedure.
The motion needs at least one-fourth of the House members to sign the notice, given 14 days in advance, and must pass by a two-thirds majority of the total membership of that House.
Step 5: Eliminate the others.
It is not limited to the Lok Sabha, not a joint sitting, and not the Supreme Court.
Step 6: Conclude.
Impeachment can be initiated in either House of Parliament.
Answer: Either House of Parliament