I was going through my wife's old tax returns because I noticed her passive rental loss carryover seemed small. I realized that in 2019, the filer input the prior year loss incorrectly (entered a zero when there should have been some carryover). So that error carried forward all the way to 2022's returns. But, we havent been able to claim any losses during that time so none of the errors affect the tax owed, etc.
Can I file just an amended return for 2022, or do I need to amend all the returns that reported the incorrect information? Or just put the correct carryforward losses in my 2023 returns?
Thanks!