What is the correct way to write a conditional statement?



                        <?php if is_tag( 'Premium' ){
                         <a href="<?php the_permalink(); ?>" class="info"> Subscribe</a>
                       
                        }else {
                        
                        <a href="<?php the_permalink(); ?>" class="info">Read More</a>
                        }
                        ?>                   

Help Needed.