ISO Exercise and Hold -- Why am I being taxed?

Hi there,

 

I'm seeing what definitely feels like a bug, and more than 1 thread revolving around this seems to prove my theory:

 

https://ttlc.intuit.com/community/taxes/discussion/does-entering-iso-exercise-amp-hold-bargain-eleme...


https://ttlc.intuit.com/community/taxes/discussion/turbotax-counting-my-iso-exercise-twice-after...

https://ttlc.intuit.com/community/taxes/discussion/i-exercised-and-held-isos-do-i-need-to-fill-both-...

 

I'm looking for an approved answer from TurboTax to explain what is going on. I'll explain what I'm going through, which seems to mirror what others are going through.

 

Step 1) I went to Investment Income -> ISO Exercise and Hold and I entered in two exercise entries on my Form 3921. I only bought, I sold nothing. IMMEDIATELY, my taxes due went up a large amount.

 

Step 2) I went to Other Tax Situations -> Alternative Minimum Tax and filled everything in. I can see my ISOs listed here. At the end of the calculation I see:

Alternative Minimum Tax: $0.00

It clearly shows my Tentative Minimum Tax being less than my Regular Tax.

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What is going on here? In your own blog it says that besides AMT there should be no additional taxes due:

https://turbotax.intuit.com/tax-tips/investments-and-taxes/incen[product key removed]ns/L4azWgfwy

Why has my taxes due shot up? Can someone please explain this?