You should also use Form 843 if you're requesting a refund of penalties and curiosity or an addition to tax that you just already paid out. You can use this Form 1040X if you'll find changes with your filing status, income, credits or deductions. (Browse more details on common mistakes https://rafaelznzlx.sharebyblog.com/35321111/the-5-second-trick-for-irs-form-1040x-preparation-service