So my old iphone scrren went out and i had to get a new phone. I have a new iphone and i cant get into my icloud with out the access code texted to my iphone. What should i do?

Keep your trusted phone numbers up to date

To use two-factor authentication, you need at least one trusted phone number on file where you can receive verification codes. You can update your trusted phone numbers when you follow these steps:

1. Go to your Apple ID account page.
2. Sign in with your Apple ID.
3. Go to the Security section and click Edit.

If you want to add a phone number, click Add a Trusted Phone Number and enter the phone number. Choose to verify the number with a text message or automated phone call, and click Continue. To remove a trusted phone number, click next to the phone number you want to remove.

Taken from -- Two-factor authentication for Apple ID - Apple Support