Recently learned that we need to amend our federal return from MFS to MFJ and that we only to amend one of the federal returns. Therefore, we have to amend our Ohio returns from MFS to MFJ, so do we needed to amend both or just one? Does having to amend our return change the answer to the number of federal returns that need to be amended to MFJ. In addition, do we need to amend last years Ohio return before be file this years Ohio return?
