What Year to Credit Voluntary After Tax Cont?

I have a plan... all employees are HCEs (1 owner... everyone else earns megabucks).  It's just a 401(k) plan.... none of the employees get an ER Cont

One of the employees has asked about contributing a VAT contribution.  Can this employee still max out 2025 to $70K ($23,500 deferral + $46,500 Voluntary) at this point?  Or would any VAT Cont made now be for 2026?

After tax contributions have to be deposited by January 30, 2026 to be counted for 2025 calendar year 415 limit.