Hello DonLandry_TX,
Apple Support Communities is a great place for help with setting up emails on your iPhone, and we’re glad you were directed here from the related article Add an email account to your iPhone, iPad, or iPod touch.
From the description it sounds as though you may have already signed in but needing to re-enter your email account password. If so, follow the steps outlined in the section titled Check your email address and password of the following article.
If you can’t send email on your iPhone, iPad, or iPod touch
If you continue to have issues after following those steps, the next step would be to remove and set up the email again. Those steps can also be found in the article above.
Take care!