You will need to upgrade to the TurboTax Self-Employed online edition if you are going to be reporting your Single Member LLC as a disregarded entity on a Schedule C.
See this TurboTax support FAQ for calculating estimated taxes - https://ttlc.intuit.com/community/tax-payments/help/can-turbotax-calculate-next-year-s-federal-estim...
You cannot use TurboTax to pay the estimated taxes. You can only print and mail the Form 1040-ES to the IRS with your payment. Or you can pay estimated taxes directly with the IRS using the payment website - https://www.irs.gov/payments
