I left the property in TurboTax as a rental with no expenses/income from 2015 to 2020 as a placeholder to carry forward losses/depreciation until I was able to claim them last year.
That was a dire mistake. Depreciation stops on the date the property is converted to personal use.If you did not convert the property to personal use on your tax return, then you have been taking depreciation since you started uses it as your primary residence. That's a deduction you were not entitled to and were not supposed to take. Additionally, since your error was for more than 2 years, simply amending is not an option. You need professional help to fix this and correctly report the sale so that the correct amount of depreciation will be recaptured, and the correct amount of gain will be taxed. If your state also taxes personal income, this will most likely be a double whammy.
