Get your taxes done using TurboTax

 My Home & Business on Windows 11 is working right.  Have you updated your program?  The Enchanced Senior Deduction is automatic and is listed separately from your Standard Deduction.   The 6,000 senior deduction will be calculated on 1040 Schedule 1-A page 2 Part V Enhanced Deduction for Seniors.  . On a joint return the phaseout is calculated separately for each person, so the 6% phases out $6,000 for each person. 

Schedule 1-A total on line38 goes to 1040 line 13b.         
https://www.irs.gov/pub/irs-dft/f1040s1a--dft.pdf

Here is a spreadsheet I made