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?

[tow_mih]

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.

Thank you !

[MichaelL1 · Accepted solution]

I would amend the 2017 returns prior to doing the 2018.

The reason for this is that information is trasfered over from the prior years, so after the amending the 2017 return, you will start with the correct information from 2017 when you do the 2018 return.