@jsyver wrote:
Am I at risk of any penalties for not finding a way to pay the estimated tax on this sale during 2019?
Generally, most taxpayers will avoid the underpayment penalty if they owe less than $1,000 in tax after subtracting their withholdings and credits, or if they paid at least 90% of the tax for the current year, or 100% of the tax shown on the return for the prior year, whichever is smaller.
See https://www.irs.gov/businesses/small-businesses-self-employed/estimated-taxes
