If it is a direct rollover (code G in Box 7), it will not be taxable, and will not change your tax return. After your return is processed, prepare an amendment and add the 1099-R. If in fact, it doesn't change your federal or state tax returns, cancel the amendment. And if your tax refund or tax due does change, you can file the amendment then. But wait until after your returns are processed; the form isn't available yet anyway. And you probably don't need to file one.