John Adams helped him edit it, and then fought eloquently for it's passage.
After it's passage Adams would be sent to Europe as ambassador to various countries, he would be there to help negotiate the Treaty of Paris, which ended the war.
During the war, Jefferson served as the governor of Virginia, and then at it's end was sent to England to prepare the way for trading.
Later, once the US Constitution was ratified, the two men served in George Washington's government with Adams as Vice President and Jefferson as Secretary of State.
The men's relationship would become strained til they were no longer friends, things grew worse between them when Adams followed Washington as the second President, with Jefferson as his Vice President.
After his first term, Adams was defeated by Jefferson, and then he retired to his country estate in Massachusetts. Jefferson would serve two terms, and then retired to his own estate in Virginia.
Over time the two men, who had helped found and then set the structure for the new country, renewed their friendship. Corresponding through a famous series of letters, they discussed many things, especially politics.
On July 4, 1826, fifty years to the day after the Declaration of Independence was announced, it's two principal makers died, within hours of each other.