You should also use Form 843 when you are requesting a refund of penalties and interest or an addition to tax which you already paid out. You are going to need to file an amended tax return if you receive information after filing your initial return that significantly changes your https://i-forgot-to-include-incom57666.laowaiblog.com/34455563/how-to-fix-errors-on-a-previously-filed-tax-return-an-overview