Remove space before the tab

I can’t see the page at your link as it is a draft.

Is it the vertical space above the tab group that you want to change?

If so, and that is the only CSS change you want to make to the tabs, try adding the following CSS rule to a child theme or using a Custom CSS plugin:

.responsive-tabs-wrapper .responsive-tabs ul.responsive-tabs__list {
	margin-top: 0;
}