In a letter, where would you need to put a comma?

between each paragraph

after the salutation

after your signature

before the closing

- After the salutation: A comma is needed after the salutation, such as "Dear," or "Hello," in a letter. For example, "Dear Mark," or "Hello Jane,".

- Before the closing: A comma is needed before the closing of a letter, followed by the writer's signature. For example, "Sincerely," or "Best regards," before your signature.