Discover how to use certified mail or portals to prove timely submissions and avoid denials for late filing.

https://docs.google.com/spreadsheets/d/1u8w2CiXvkxs7jgfMLP2cf04EO4oQJpBkzdKjkGv-O54/edit?usp=sharing

Discover how to use certified mail or portals to prove timely submissions and avoid denials for late filing.