A 401(k) traditional IRA contribution max is 23,500. Why does TurboTax say it’s only 7000

Your 401(k) is not an IRA.  Enter amounts shown in box 12 of your W-2 only in box 12 of TurboTax's W-2 form, nowhere else in TurboTax.  Remove the erroneous IRA contribution entry that you made.

A 401(k) plan is different from a Traditional IRA.

Please read this IRS document.

Below is an extract:

Highlights of changes for 2025

The annual contribution limit for employees who participate in 401(k), 403(b), governmental 457 plans, and the federal government’s Thrift Savings Plan is increased to $23,500, up from $23,000.

The limit on annual contributions to an IRA remains $7,000. The IRA catch‑up contribution limit for individuals aged 50 and over was amended under the SECURE 2.0 Act of 2022 (SECURE 2.0) to include an annual cost‑of‑living adjustment but remains $1,000 for 2025.