How to format a formal letter

I need to know the format of a formal letter so I can write one. I don't know where to start.

There are a few key elements that must be included in a formal letter:

The heading should include the sender's address, the date, and the recipient's address.
The salutation should be Dear followed by the recipient's title and last name.
The body of the letter should be single-spaced with a space between each paragraph.
The closing should be formal (e.g., Sincerely, Best regards) followed by a comma and the sender's signature.
The sender's name and address should be included below the signature.

Here is a template that can be used for a formal letter:

[Sender's Address]
[Date]

[Recipient's Address]

Dear [Title and Last Name],

[ Body of Letter]

Sincerely,

[Your Signature]

[Your Name]

There are a few things to keep in mind when writing a formal letter:

Address the letter to the proper recipient. If you do not know the person's name, you can use a generic title such as "To Whom It May Concern."
Use a formal tone throughout the letter. This means avoiding contractions (such as "don't" or "can't"), using proper grammar, and choosing language that is respectful and professional.
Make sure the letter is clear and concise. Get to the point quickly and avoid rambling.
Use proper formatting. A formal letter should be typed and include a proper heading (such as your name and address, as well as the date), as well as a proper salutation (such as "Dear Mr. Smith").
Be sure to proofread your letter before sending it. This will help avoid any embarrassing mistakes.