I use a form to enter data pertaining to a project

I would like to use the same form to call up the entered data so that it may
be edited.

The entered data is currently pasted into a set selection of cells on one of
the sheets and the data is used elsewhere in the spreadsheet.

At present, I can only enter the data once and if one were to use the form
again it would overwrite everything.

Ideally I would use an edit button to call up the form containing the
already entered data that could then be edited.

Can anyone help?