Does anyone know when the interest payments are calculated from? From the time you file (ie the date you mail it in), or when they receive and work on it?
also, if you filed your original return on time, do you get a penalty? Or just the 5% interest for the additional amount?
another question - can you pay your amended amount due before you actually file it? Would that make it so that interest wouldn’t be do? Or do they just care about the date you file the amendment?
