"Do I show $0 contribution for Traditional IRA, then enter $6500 for Roth and then show that $2100 was recharacterized."
Yes, that's exactly how to enter it. TurboTax will prompt you to enter an explanation describing the recharacterization where you'll indicate that you recharacterized $2,100 of your original $6,500 Roth IRA contribution and that a gain-adjusted amount of $2,134.63 was transferred to the traditional IRA. Your tax return will show a $2,100 traditional IRA contribution, either deductible on Schedule 1 line 32 or nondeductible on Form 8606 line 1.
