I was faced with a situation where I needed to set up an index for widgets but I wanted those to start at zero. I made some attempts to import information and deleted those records from the table several times and was faced with a situation where users might see the index occasionally. As a result I wanted the index to start from 1 and at least at the start go up to the approximate number of widgets.
Its a quick search using google to get this but wanted to reset the identity on a blank table.
In SSMS / navigate to the database and open a new query window
DBCC CHECKIDENT (dbo.t001table, RESEED,0); GO