Filing a prior year tax

[azafar6]

I had filed extension for a prior year but did not file even after the extension date. What would the federal and MA-state fines and penalties be, if I file now?

P.S. I think I owe little to zero taxes for that year.

[DoninGA]

There is no way to know what the penalties or interest on the unpaid taxes will be until you have paid the taxes owed.  The IRS and State will send a bill in the mail for any penalties and interest owed after they receive the payment.

See this IRS website for penalties and interest - https://www.irs.gov/businesses/small-businesses-self-employed/understanding-penalties-and-interest

There are no penalties or interest if the tax return is being filed with a tax refund or no taxes owed.