Thank you for using justanswer. Most states, including NC and MI (where I live) have an "open window" or "statute of limitations" written into the state tax law for 3 years from the due date of the return for filing for any refunds or making any changes that would reduce the tax owed.
There is a 10 year statute of limitations when it comes to NC being able to collect any tax, UNLESS THE LIABILITY HAS BEEN ESTABLISHED WITHIN THE PROPER TIME FRAME. If the tax liability has been discovered during the proper time frame (meaning 10 years or less) then there is no statute of limitations for collection.
I know this was not the answer you were hoping to hear, but I hope it gives you some clarity of the way state taxation laws work.
INDIVIDUAL INCOME TAX GIFT TAX ESTATE TAX
I have included a link for the NC "offer in compromise form"
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Hi again Customer
I know this may sound like a non-answer, but the truth is there really are no rules when it comes to dollar amount for OIC's, other then you should offer as much as you can. (That's the non answer part)
Offer as much $ as you possibly can up front. Try to avoid the installment option. "A bird in the hand is worth 2 in the bush" has some merit when it comes to OIC's.
If you haven't already spoken to a taxpayer advocate, you should. This is a free service, and I've given you the link for the service in NC. These people should be able to guide you thru this process.
Contact a Local Taxpayer Advocate (LTA) in North Carolina
I hope this helps and the best of luck to you.