A free tool that runs both of Delaware's calculation methods side by side. You enter authorised shares, issued shares, and gross assets, and it shows what each method produces.
It exists because the state defaults to the authorised shares method, which gives an alarming figure for a company with 10,000,000 authorised shares. The other method usually costs far less.
Inkle Tax prepares and files US federal and state returns for your company.
Full guide
How to Calculate Delaware Franchise Tax?