Why ain’t it showing how much I’m getting back for head of household

Your tax refund is on line 20 of your Form 1040.  You do not "get back" a set amount for filing as HOH.  You get the standard deduction for HOH, which makes less of your income taxable.

PREVIEW 1040

https://ttlc.intuit.com/questions/1901539-how-do-i-preview-my-turbotax-online-return-before-

Your standard deduction lowers your taxable income.  It is not a refund. 

2019 Standard Deduction Amounts

Single $12,200   (+ $1650 65 or older)

Married Filing Separate  $12,200   (+ $1300 if 65 or older)

Married Filing Jointly $24,400   (+ $1300 for each spouse 65 or older)

Head of Household $18,350  (+ $1650 for 65 or older)

Look on line 9 of your 2019 Form 1040 to see your itemized/standard deduction amount