I’ve had the opportunity to convert both of my character sheets (AD&D 2E and D&D 5E) to be form-fillable. The AD&D 2E sheet even fills in the various attribute-related columns for you based on attribute scores (It knows if you are using Skills & Powers too!)
The existing versions of the sheets are still available on the RPG Resources page, and here are direct links to download the new fillable versions:
Download Old School AD&D 2E Character Sheet - Fillable Version
Download D&D 5E Character Sheet - Form Fillable Version