Amended 2016 Federal return due to not including a business deduction. 2017 was already filed/accepted by IRS. Do I now have to amend 2017 prior to filing 2018?
Do I also have to revised 2016 State taxes....the change to the 2016 Fed provided a refund. All prior years were done on Turbo Tax programs so am not sure if TT would automatically advise me to update 2016 CA and 2017 CA/Fed.
