Tacoma Frame Rust

I was informed that there is a rust issue needing immediate attention for my 1998 Toyota Tacoma. I was informed that Toyota Voluntary recall has expired. Iv maintained exceptional service of all mechanical issues but was never told about the frame rust issue until last month.
Im at a loss on how to proceed with the future of the truck-sell, repair, part out.
Any suggestions or guidance as to what to do. Thank you

 

You need a professional to inspect the frame and give a determination.

Internet guesses, especially with no pics or additional info, would be futile. And maybe dangerous to your health.