Say someone got a cash gift of say $1000 in 2006, $4000 in 2007 and didn't report it, unaware they were supposed to treat it as income. Now they're concerned this could come back on them and wants to amend their return for those years.
Is there a way to know what the interest/penalties could potentially be on this? Or is it at the discretion of the IRS?
Also of concern are other possible problems it could cause. If one's sibling also got a cash gift, is the IRS likely to look at them as well once they've been alerted that one of them has gotten this gift? Would doing something like this cause the IRS to put one on some kind of scrutiny list or the like? Will they just take your word that this is how much the gift was? In one case a photocopy of the check was made before it was cashed, in another case it wasn't. Neither was deposited.
What do you see as the realistic up side & down side of just forgetting about it and not doing anything about it?
Thanks