Ok ...the IRS will now ask the employer for the records hence the 60 day extension. So ask the employer to respond to the IRS when contacted even if she did file the W-2 & W-3 & 1096 timely. If she did NOT do it electronically then the paper forms had to be entered manually and when humans are involved mistakes can be made. I had a client with this situation last year where only their W-2 form had an IRS issue out of 8 total employees and the employer mailed in the forms .... bottom line it took 8 months for the employer & IRS to get this corrected.
What you could do ? First talk to the employer. Talk to the IRS and see where the employer can send the supporting docs in advance of being contacted.