Can I revise my tax returns for 2016 through turbotax, to see if the accountant that prepared them made a mistake? If so, up to how many years I can go back and revise?

[Marketstar · Accepted solution]

Yes, but assuming you did not file with TurboTax in 2016, you will need to purchase the 2016 TurboTax software and duplicate your accountant prepared return.

See https://turbotax.intuit.com/personal-taxes/past-years-products/

You can file/amend for a refund for the 2014, 2015, and 2016 tax years.