My calculation is incorrect

Jaclyn Biggs, who files as a head of household, never paid AMT before 2021 . In 2021 , her regular tax liability was $102,220 which included $39,900 capital gain taxed at 20 percent, and her AMTI in excess of her exemption amount was $422,500. Required: Compute Jaclyn's total income tax for 2021. Use Individual Tax Rate Schedules. Individual Tax Rate Schedules Married Filing Jointly and Surviving Spouse Married Filing Separately Head of Household Single