TurboTax Online 2020 was unable to calculate the the correct tax on my Form 8915-E plus Form 8606.
TaxHawk Online got the correct result there but was unable to calculate the correct tax using the required
Schedule D Tax Worksheet.
Another provider No.3 produced yet a different (wrong) total tax.
Finally found a tax program that calculated every thing correctly, after its May software update.
The 2021 Tax Day had been postponed.
Hint: it wasn't TurboTax.
@john989
