Here are some estimates...
Your basis is the original purchase price $153,458
and adjusted basis is $153,458 PLUS $100,000 (improvements) MINUS (accumulated depreciation) PLUS (selling expenses - Realtor fees, etc) = $253,458
So your estimated gain is
$1,900,000(assumed selling price) MINUS $253,458 (adjusted basis) = ~$1,650,000
So if that is your ONLY income - following are estimated tax liability.
Alternative Minimum Tax:$79,640
Net Investment Tax:$53,200
Total estimated tax liability - $366,840
These calculations are based on information your provided, joint filing status and standard deductions.
Please verify if you have any additional income or deductions - and I will adjust estimations.