A project price from the work you actually listed

Task by task, then a buffer, then expenses. A fixed price with no buffer is a promise with nothing behind it.

Hours, task by task, one per line

Your rate per hour

Buffer for the rework, percent

Things you pay for, one per line

Every line above comes out of the boxes you typed. Nothing is stored, nothing is sent, and there is no account behind this page.

Add a line for the round of changes you expect. If you write 'two rounds included', say how big a round is, or the sentence means nothing.
The quote is not the contract. What is included, what is late, and what ends the project are sentences you write, not numbers this page can guess.