State tax filing

Thank you.  So this also means that I'll have to file amend returns for the last so many years?  And for the years that I might have net losses (not much) to add back to income, I'll have to pay interest penalties calculated back to the year that might have been 6-7 years ago?  And for the years that I had net gains to be deducted from income, I'll have just refunds only?

 

How far back do I need to go to amend the returns for all these years?  Is there a statue of limitations for this state?