@allene wrote:
What I am worried about is not my data being corrupt but perhaps some calculation changing. But bottom line, why would I want to upgrade a program for a year that was already filed?
Prime example is tax code changes which affects prior year tax returns. Tax code change for the Nonbusiness Energy Property Credit was passed in December of 2019 that affected both tax year 2018 and tax year 2019. An update to the TurboTax 2018 software was needed for this tax code change.
