I will not have form 5498 until 5/15/26, so what do i do with tax foling for 2025?

[DoninGA]

A Form 5498 is an information form only.  It is not entered anywhere on a tax return.

[dmertz]

If you made ordinary traditional or Roth IRA contributions, you enter these amount under Deductions and Credits based on your own account records.

[baldietax]

and if you're asking for the question about the market value of your Traditional IRAs as of 12/31/25 which Turbotax confusingly refers to 5498s that are generally not yet available, you should use your year-end brokerage statements for this as per IRS instructions for Form 8606 Line 6.