Yes, that's correct. Even though one would think the alternate calculation would only involve the income the spouse makes who is covered by the marketplace insurance, the IRS instead just takes the total household income and divides it in half.
If your taxes are going up even more than the total amount of advanced premium tax credit received, TurboTax may be assessing additional underpayment penalties on the amount owed. Depending on your tax situation, you may be able to get those waived. TurboTax should ask you automatically if this pertains to you, but you can also visit the underpayment section in Federal > Other Tax Situations > Additional Tax Payments > Underpayment Penalties.
@dcostanzino I finally got your name right this time. Sorry.
