If i think i am owed more money from prior years tax returns how do i go and refile them and how long or how many years back can i refile?

[PaulaM · Accepted solution]

You can amend 3 yrs from the date you originally filed, or 2 yrs from the date the tax was paid, whichever is later.

https://ttlc.intuit.com/questions/1894381-how-to-amend-change-or-correct-a-return-you-already-filed