The National Institute of Mental Health notes that people with ADHD often struggle with forgetfulness, lack of organisation, and time management, and are easily distracted by impulsive thoughts. This can make it extremely difficult to complete tasks from start to finish without getting distracted by something else, and when you're working from home, inevitably, there will be more of these distractions.
I'm a huge proponent of keeping all sorts of notebooks, journals, and planners, but even these are only so helpful. I've become exponentially more productive by using a weekly notepad that sits on my desk at all times. This works better than a journal or a planner because it can't be closed, put away, and forgotten about — which is essential for people with ADHD, for whom objects that are out of sight are often out of mind. My desk pad is always sitting out ready for any spur-of-the-moment thoughts that tend to slip away if I don't write them down immediately.
If your symptoms also manifest as organisation difficulties, I suggest a desk pad like this Good Vibes Only Weekly Notepad ($16) on Etsy, which has multiple areas for note-taking. These sections include a weekly calendar, a top priorities section, a to-do list, and a general notes section, making organisation and prioritising tasks relatively easy.