I want to eliminate white space under menu

Link please

sorry

https://www.infoliga.schleider.com.ar/

Update this lines on your custom css file

.header-search {
  background: transparent none repeat scroll 0 0;
  filter: none;
  left: 750px;
  position: absolute;
  top: 80px;
  vertical-align: top;
  z-index: 1000;
}

excellent, thanks!

Welcome Cheers ??