I NEED TO USE MY REDEMPTION CODE TWICE

You can only redeem it on one account but from that account you can install it on multiple computers. You would need to access the game through her account though.

hello,my sister gave me her sims4 game because she dont play it but the code has already been used,what can i do??...what i need to go into her account?

---

@saaphari-2 wrote:

.what i need to go into her account?

---

Yes

You can also try if a game advisor is willing to help you out though

Game advisors can be found through live chat or call-back

1. https://help.ea.com/en/contact-us/ 
2. Click on the orange NEXT button
3. Select a platform
4. Click on the orange NEXT button
5. Select a topic and describe your problem in a few words
6. Click on the orange NEXT button
7. Click Chat Now to chat with a Game Advisor or leave your phone number for a call-back
   

In Details here: How to contact a Game Advisor using the new EA Help page