Oh, indeed, if you are someone who normally files their own returns, the Severance Tax amended forms are easily found on the Colorado.gov website and I always encourage folks to do their own filing. For those of you that use an accountant, it is they that have the details of the original return as filed and you probably have confidence in them to prepare your financial information correctly. Just get 'er done: either by doing your own amendment or with the help of your usual tax prep person.