A good thing to remember when writing: the first letter of the first word of a sentence is always capitalized. Always. Secondly, “said” is almost never capitalized. This:
“Hey.” Said the guy.
should nEVER EVER HAPPEN. “Said” pretty much never ever starts a sentence and certainly never with quotes or dialogue.
USING SAID: “Hey,” said the guy.
Any time you would put a period at the end of the quote, but it is followed by a dialogue tag, replace the period with a comma.
If the quote ends with a question mark or exclamation mark, the capitalization remains the same: “Hey!” said the guy.
ONLY, ONLY EVER, USE A PERIOD IF THE DIALOGUE TAG (THAT’S WHAT SAID AND ALL THOSE OTHER WORDS ARE) COMES BEFORE THE QUOTE: The guy said, “Hey.”
THIS HAS BEEN A PSA
THERE MUST BE A PARAGRAPH BREAK EVERY TIME A NEW CHARACTER SPEAKS
THIS IS NOT OPTIONAL
NO ONE WANTS TO READ ONE BIG BLOCK OF TEXT JESUS CHRIST