Courtesy of the infamous Dan Diebolt who haunts this forum, this worked for me in an app
Jump to a spot on a form
The formula-URL to initiate the jump was
"javascript:void(window.location.href='#DealerClaim');"
The anchor tag for where to jump to was a formula-text field with HTML enabled with the formula
"<a name=DealerClaim></a>"
In my case I chose to call the link DealerClaim. You can all it what you like. The name is case sensitive and I suggest no spaces or special characters in it as I don't know if they will break the functionality.
So, you put the first part at the top of the form, and the target near where you want to jump to. On the target, hide the field label with an alternate text of blank once you get it working.