Retirement tax questions

After looking and discussing allday with TT as well as the advice given
" it appears that one W-2 box 12 entries were erroneously marked as code A (Uncollected social security or RRTA tax on tips), and code B (Uncollected medicare tax on tips). These errors caused you additional tax liability on Form 1040 line 62, code UT as well as additional payment from line 71 as cited by IRS."    Its late now but I will hit it again in morning..and hopefully this is the issue..likely is.  Bad thing is I cant find my original 2014 w2...still looking.  Hope my old job gives me a copy asap. will let cha know  if irs is forgiving of the issue.