When reviewing how the tax already paid was caculated, it included another amount and describes it as "other tax payments you made throughout the year"

[bmcdermott24]

need to know what this amount is - didn't pay any additional tax throughout the year

[MinhT1]

If you did not pay estimated taxes, the tax paid throughout the year could be the additional Medicare tax of 0.9% withheld on earnings over $200,000 for the year.

[bmcdermott24]

No income above $200,000. Refund in 2020. Only taxes withheld were through employer

[HelenC12]

Preview your 1040. The Tax Smart Worksheet and line item 16 show tax amounts that are reflected on you income tax return. 

• Please see the instructions to Preview your 1040.