Don't do that.
First of all, the IRS knows what they paid you (it will be on notice 1444 and 1444-B that they mail after sending the payment). If you make a claim as if you did not receive a payment, they will either reject your e-filed return, or correct your return and reduce your refund to account for the payment they sent. Then, if you ripped up the check in the mean time, you will have to request a replacement check and I have no idea how long that will take.
Second, the IRS won't open e-filing until at least January 27. Any returns filed earlier through Turbotax will only go into cold storage. So the earliest you might get a refund is February 10. And if you are claiming the additional child tax credit (for certain low income taxpayers) or earned income credit, the PATH act prevents the IRS from making any refund payments until the last week of February at the earliest.
