

I think it depends on where they’re turned off. In Signal itself you can change it to remove the message text from the notification, or a few other variations.
If you just have notifications off on your phone in general, the notification is still being generated by the app and could potentially be stored somewhere on a server before being filtered out by your phone.
FreeFillableForms works regardless of your income or if you have other unconventional things to claim. It’s just a bit more manual than some of the other apps, but does support e-File. I find the instructions are pretty easy to follow though, especially if you can reference your previous year’s return.