Have you arranged for a payment plan with the IRS yet? If so you might have a shot if you can demonstrate to the lender you have agreed to pay back the debt in good faith. The payment will count against you in your debt to income ratio when qualifying for the refinance.
If not you have very little chance as the lender would not want the lein place on the property behind their first lein.
If not you have very little chance as the lender would not want the lein place on the property behind their first lein.