When I filed my taxes earlier this year, I was surprised to be owing the IRS over $10,000.
- I did exercise a bunch of ISOs without holding them, and
- apparently my request to change my withholdings from 1 to 0 was lost in transit or ignored by HR (I see my signed W4 from November 2017 in my employee documents vault); I was still on 1 withholding when I knew I should be on 0.
Still, it seemed $10,000+ was excessive, but I also read there were changes to tax laws that surprised many Americans, so I filed.
Since then, I've heard 2 coworkers say TurboTax said they owed $10,000, but a CPA brought that down to $2,000.
Is it too late or unadvised to go to a CPA now? Will any CPA take this kind of work in May? Will I be able to get a refund if there is a correction to be made?