TURBOTAX ..WRONG CALULATION of Social Security Income

Form 1040SR .. Social Security .. Taxable amount show 0...  Should not be 0 on line 6B .. 6 A has a sum of SS benefits...  How do we fix this ?  Using online Premium.  SO FRUSTRATING ! Total income is wrong. Tax owed is wrong. BIG WASTE OF TIME.  No help from Cust. Service