Change Some Text in Checkout Page

Hello,

How can I change the text there?

As a first step you can start right here:
— https://woocommerce.com/posts/customize-checkout-fields-woocommerce/
— Checkout Fields Customization

For us to take a closer look can you provide your site URL so that we can add an item to the cart and then go to check out to inspect the elements on that page?

After that, we can make a better recommendation.

Thanks.