If you used the electronic filing option from the online Quick Employer Forms software, then your W-2/W-3 forms will be sent to the SSA and you do not need to mail them to the federal government. You will need to check on what your state requirements are, if any, for the W-2's you created and if printed copies need to be mailed to them. You can find out that information on your state's web-site
Here is more information from Quick Employer Forms FAQs
I e-filed my form(s), how will I know it was accepted with the IRS or SSA?
After e-filing your W-2 or 1099 form, please monitor your filing status on the Quick Employer Forms Home Page.
The e-file status will update from "Sent" to "Accepted" or "Rejected" when the Government Agency processes the form.
The status change may take up to 2 to 4 weeks. You will also receive a notification by e-mail when the status changes. E-file is due by January 31, 2019 .
