Which EAD card shall I present to my employer?

I got my first EAD in 2020, which is active from 2019 to 2022. 7 months later, my husband went to a new employer and the attorney extended his H1B and my H4 and EAD. Then I got new EAD from 7/2020 to 3/2023. Now I have two active EAD cards.

My question: which card shall I use? I’m still with my employer, no change. Shall I give them my new card when I received it even my old EAD is not expired?

Technically either or can be used till its expiry but you should use the most recently issued card. Just provide the copy of new card to your employer once you receive.