Answer:
"I would like to know if I may deliver the registration form tomorrow, if possible. Thank you."
Explanation:
The word "may" is used to make formal and cultured requests. For this reason, phrases that use this word must follow a standard, rigid language and within the required formality, giving the whole phrase cohesion and harmony. This word can also be indicated to deny or accept an order, following the standard of polite and formal language.
