would like to add my in address in header

Try a snippet

There’s a snippet for this on the theme’s site: https://www.themesandco.com/snippet/add-2nd-line-tagline/

Thank you EF and Rdell but can I use without using a child theme. I never set up a child theme. I tried adding the three pieces of code but it did not work. Not sure if I did it right.

You don’t need a child theme. You just need to paste the first block of CSS into the Custom CSS panel in Customize’it.

I tried this and its not working?

As ElectricFeet said, go into the Custom CSS panel in Customize’it. Found?
And paste this code (from the link suggested by rdellconsulting):

.site-description:after {
    content:      "YOUR ADDRESS";
    display:      block;
    font-size:    0.8em;      /* optional */
    font-weight:  normal;     /* optional */
    opacity:      0.7;        /* optional */
}

I have tried this and its just not working. here is all the code I have in my custom css.

/* Move SI to Right, adjust margins if needed */
.navbar-inner .social-block {
float: right;
margin-right: -30px;
text-align: right;
}
/* Move Tagline to Right, adjust margins if needed */
.navbar-wrapper .navbar h2 {
clear: both;
float: right;
margin-top: 0px;
margin-left: 20px;
text-align: right;
}

.navbar .navbar-inner {
-webkit-box-shadow: 0px 0px 0px;
-moz-box-shadow: 0px 0px 0px;
box-shadow: 0px 0px 0px;
}

.site-description:after {
content: 662 Turnpike St;
display: block;
font-size: 0.8em; /* optional */
font-weight: normal; /* optional */
opacity: 0.7; /* optional */
}
footer#footer {
background: none repeat scroll 0 0 #808080

First, you missed the quote.
content: "662 Turnpike St;"

I tried the quotes and still nothing.

Firebug is showing:

.site-description:after {
  display: block;
  font-size: 0.8em;
  font-weight: normal;
  opacity: 0.7;
}

so no evidence of the content: being added?

I figured it out. I hade to put it in the style.css file. For some reason it just would not work in the custom.css. Now is there a way I can create more lines so I can stack the address? Thank you all very much for the help.

For some reason it just would not work in the custom.css.

Custom CSS is not a file, it is a panel in Customiz’it that allows you to enter CSS without a stylesheet in a child theme. It’s not an issue for you now, as you’ve created a child theme, but I thought I’d explain for others.

As to your problem:

The method above is a quick and easy fix for a second line. It will not work with more than two lines.

The solution for a multi-line address in the tagline would be to add the following code to a functions.php file in your child theme’s folder.

// Use filter 'tc_tagline_text' to add extra lines to the tagline (not very advisable, as google is expecting a tagline)
add_filter( 'tc_tagline_text ', 'my_tagline_text' );
function my_tagline_text($html) {
    $my2ndLine = '<br /> This is my 2nd line';
    $my3rdLine = '<br /> This is my 3rd line';
    $my4thLine = '<br /> This is my 4th line';
    $html = $html . $my2ndLine . $my3rdLine . $my4thLine;
    return $html;
}

Note that this is a bit of a mis-use of the tagline. Search engines will be expecting a pithy phrase that describes who you are / what you do in that “slot”, not an address.

If you haven’t created a functions.php in your child theme yet, then read How to customize the Customizr WordPress theme? first. You should not edit the theme’s own functions.php.

Apologies: I just spotted extraneous blanks in there that aren’t needed. The code should be:

// Use filter 'tc_tagline_text' to add extra lines to the tagline (not very advisable, as google is expecting a tagline)
add_filter( 'tc_tagline_text ', 'my_tagline_text' );
function my_tagline_text($html) {
    $my2ndLine = '<br />This is my 2nd line';
    $my3rdLine = '<br />This is my 3rd line';
    $my4thLine = '<br />This is my 4th line';
    $html = $html . $my2ndLine . $my3rdLine . $my4thLine;
    return $html;
}

I just published a snippet of this, which is and even shorter version.