Estimates are made Quarterly and overlap the calendar year. Payments are made in January to compensate for the earnings of December.
These payments are then applied to the tax return that is not due until (July 15, 2020 for the extended due date for tax year 2019)
Sometimes Taxpayers make payments whenever they want. TurboTax wants to be sure the payments made are posted to the intended year.
[Edited 03-24-2020 | 05:46 PM]
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