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Level 2
January 18, 2021
Question

Line 12a, Form 1040 Where does this calculation come from?

The IRS has contact me to send backup information for the amount on line 12a of my 1040 form for 2019 taxes

    2 replies

    Mike9241
    Level 15
    Level 15
    January 18, 2021

    there are multiple possibilities

    here's a link to 1040 instructions for line 12a - look on page 31. (yes the instructions are for 2020 return but they are the same as 2019)

    https://www.irs.gov/pub/irs-pdf/i1040gi.pdf 

    Mike9241
    Mpharis27Author
    Level 2
    January 18, 2021

    I found the 2019 tax instructions

     
     

    www.irs.gov/pub/irs-prior/i1040gi--2019.pdf

     

     

    Line 12a of 1040 is calculated from the tax instruction table based on adjusted income