Thank you that's a good list, one I'd seen when I looked the very first time but could never find again when I tried to, so extra thanks.
Through some more searching I've hit on a useful Google term. "Checklist" in combination with thyroid, hypothyroid etc. seems to work well.
On a UK site there is a checklist where it gives not just brittle and dry nails as a symptom but soft nails too. I like this personally because the nails on my hands are soft but my toe nails have become brittle over the past few years. So I have both at the same time!
The symptom lists were a bit overwhelming for me at first but now I find them useful. I've had depression for many years (caused? made worse? by hypothyroidism) and many of the symptoms are the same. But by reading these lists I'm going to point out to my doctor some of the symptoms I have that are not shared by depression.
For example I noticed last autumn my tongue seemed bigger in my mouth, I didn't mention it to anyone, it just seemed odd. Now I know it's a symptom of hypothyroidism and not one I've ever heard of with depression so I will definitely mention it and others to my doctor to make sure she is aware of it.