USCIS, Aug. 31, 2018 - "USCIS is automatically extending the validity of certain EADs issued under TPS El Salvador through March 4, 2019.
If you are a TPS beneficiary under the El Salvador designation and your EAD is based on your TPS, your EAD may now be valid through March 4, 2019, if your EAD includes a category code of A12 or C19, you have not received your new EAD, and:
USCIS will mail a Notice of Continued Evidence of Work Authorization to individuals who are eligible for the additional 180-day automatic extension. The notice will provide evidence of the automatic extension of your EAD through March 4, 2019, to show to your employer. Individuals who receive the notice may use the notice in combination with their current EAD as evidence of work authorization through March 4, 2019. If you have a pending EAD application and believe you are eligible for the additional automatic extension but do not receive the Notice of Continued Evidence of Work Authorization by September 4, 2018, please contact USCIS at 202-272-8377 or the USCIS Contact Center number. You may show your employer this webpage in combination with your current EAD to demonstrate your continued employment authorization until your receive your Notice of Continued Evidence of Work Authorization."