Tax year 2020 will not complete until after 12/31/2020.
The TurboTax software for tax year 2020 will not be available until November 2020 for the desktop editions and in December 2020 for the online editions.
Estimated tax payments for 2020 can be calculated using the worksheets in the IRS Form 1040-ES - https://www.irs.gov/pub/irs-pdf/f1040es.pdf
Federal tax payments can be made on the IRS payment website - https://www.irs.gov/payments
