I built my own spreadsheet. It's not hard...
MFJ:
Our Fed Bracket Dollars
Up to $19,900 - 10% $1,990.00 (Calc: $19,900 - 0) * .10
$19,901 to $81,050 - 12% $7,337.88 (Calc: $81,050-19,901) * .12
$81,051 to $172,750 - 22%. $20,173.78 (Calc: $172,750-81051)* .22