What should I do if I feel my 2015 city return was prepared incorrectly by Turbo Tax?

[DoninGA]

Most all tax authorities follow the three year statute of limitations used in the federal tax code for amending a tax return that results in a tax refund.  For tax year 2015 the amended return had to be filed on or before April 15, 2019 for a tax refund.

Check with your city tax authority to find out their rules for filing an amended city tax return before attempting to amend the city return.

[Anonymous]

you could file a claim with TT if they made computational errors.    Note that most errors are caused by inaccurate entries by the Taxpayer and not computational errors.