H1 tag for homepage and single page

try and use a conditional statement;
https://codex.www.ads-software.com/Conditional_Tags
example:

<?php if( is_home() || is_front_page() ) { ?>
<h1>.....</h1>
<?php } else { ?>
<h2>.....</h2>
<?php } ?>

hat theme are you using?

can you post the code you were editing?

This is a sample of the final code (to complement the previous post)

if(is_single() ){
     echo "<h1>" . bloginfo('name') . "</h1>"
}else {
echo "<h2>" . bloginfo('name') . "</h2>"
}