<prompt> Human: My wife and I filed our taxes recently and just noticed a seemingly huge mistake. We initially filed jointly, but, just for grins wanted to see what a refund would look like if we filed separately. The refund was pretty significant, so we went ahead with it. Only issue is, my original return was still set as filing jointly and hers was filing separately. What kind of trouble can we expect for this? I imagine this is some degree of tax fraud. Simple fine? Or is this worse?  <response>: No big deal. File an amended return. 