Revisit the Traditional and Roth IRA contributions section in 2018 TurboTax. Make sure that the Roth IRA box is marked, then step through until you pass the Roth IRA basis entry section and TurboTax will present the Enter Excess Contributions page where it will show the amount that is appearing on Form 5329 line 18. Delete that entry.
(It's not clear how that amount came to be on line 18. Perhaps you previously misunderstood the entry being requested on the Enter Excess Contributions page and you entered the amount yourself. Because you corrected the excess Roth IRA contribution by recharacterizing, you made no excess Roth IRA contribution.)
