Since you have a voided 1095-A, you will not need to file a form 8962.  When the Marketplace voids the 1095-A, they do notify the IRS.  However, it may not happen instantly.  

So your options are:

1. Try to e-file now and see if it is successful.  If so, then you are good to go.
2. If not, then you can either wait for a while and resubmit OR you can print and mail the return. 

The success of the e-file will come down to when the Marketplace updates the IRS and then the IRS system updates. 

  @nmac_87 

It is possible that your client had coverage that began but then voided or cancelled.  Regardless, if the IRS believes there is a 1095-A and you do not have one to attach,  then yes, the only option is to print and mail the return with an attached statement as you will not be able to e-file.  

@JWTinDC