Can we apply H4 Extension and H4 EAD together?

Hi, my H4 EAD (and Spouse’s H1B and my H4) is expiring in Jan 2019. So we are filing for H1B extension for my spouse now.
My question is when should i renew my H4 EAD?
is it only after i get my H4 extension approved? or in parallel with H4 extension?

Apply H1B, H4 and H4 EAD together - best option

Your best option is to apply all H1B, H4 and H4 EAD together at the same time.

We normally recommend to file all three with Premium processing to get result of all 3 within 15 days.
But, H1B Premium processing may or may not be available at the time of application.

Apply H4 Extension and H4 EAD toegther

You can apply for H4 and H4 EAD separately too without waiting for H4 extension approval.