Write the chord in square brackets, right before the word where it changes. No chords? Also fine. An empty line starts a new verse.
What you type[Am]Singing together [G]around the fire
[F]until the sun [E]rises
How it will lookSinging together around the fire
until the sun rises
Copying from Ultimate Guitar, Tab4u or WhatsApp, with the chords on a line above the words? Paste it as is and we convert it. Check in the preview below that each chord landed on the right word.