jjeff said:but then about 4 months later we got a second check with a letter saying there was a mistake with my filing and we were due this much more. My wife was a little leary about cashing it as it was a somewhat large amount but I said as they had all our information, which was accurate and the IRS deemed we were owed it, it must be the case and we cashed it, fingers crossed.
Be aware that the IRS can send you a check, but you are STILL on the hook for repayment if at a later date the IRS decides they were wrong. Hard to believe, but true. You would have to ask a CPA how this tactic affects penalties for non-payment. I want to say that you would only be liable for interest but I am not certain.
So do this as a delaying tactic, not as a trap for the IRS.