Use the "Enable log-in during checkout" option on the <a href="{bbackup_94402fb9ba80f392e0976ece85f92b2b876bfcaed8d83250cc06083f7139c7d9}1$s">WP Admin -> WooCommerce -> Settings -> Accounts</a> page to add/remove the login form to the checkout. See <a href="{bbackup_94402fb9ba80f392e0976ece85f92b2b876bfcaed8d83250cc06083f7139c7d9}2$s" target="_blank">this screenshot</a>.