While accidentally putting my son middle initial wrong effect me

[reyesgarcia123]

Will accidentally putting my son middle initial wrong effect me

[KarenJ2]

Your son's incorrect middle initial will not affect anything on your return.  The IRS will match his Social Security number with the last four digits of his last name.

[Josephontano1]

forgot to add middle initial

[BrandiLO]

If you are concerned with the return being rejected due to a missing middle initial, please click here to read this thread that explains the way the IRS validates names and social security numbers.