What reports do I owe after the match?

After the match, under Law 6 you:

• Communicate the score to the teams and to the match organiser.
• If a player was sent off, give the match organiser a written report on the foul play as soon as possible.
• If an assistant referee's verbal report led to a send-off, the assistant referee submits a written report to you as soon as possible after the match, and you provide it to the match organiser.

If you believe a touch judge is guilty of misconduct, you have the power to send the touch judge off and make a report to the match organiser.