Theoretically, the sugar will add 0.4% or more to the ABV (depending upon the volumes of CO2 targeted) if you add that sugar to the recipe. In reality, most of us who bottle carbonate add the sugar as a solution. In order to properly calculate the amount of alcohol increase, you would also need to calculate the dilution of the added volume of water. A volume that the software does not know. Where I have taken the time to calculate the increase as a result of the sugar addition and water dilution, I come up with less than 0.2% actual affect on the ABV. This holds only for my process and procedure, but I am probably sure that it would be pretty close for others who pre-dissolve the sugar before adding it to the bottling bucket. It is also below the error in my measurement of volume in my bottling bucket.
In the end, I am making home brew. I don't need to make sure that the actual alcohol content precisely matches my labels for tax and government regulations, so I don't really sweat it too much.