@ sbsvwa
The option to get that Verification of Non-Filing letter has likely been in your Online IRS account for weeks. It's not dated until you view it. Whenever you click to view, it places the current date in the letter. So if you click on it on April 15, the letter will say April 15.
AFAIK, everyone starts off with a "Verification of Non-Filing Letter" available for download in their online IRS account transcript section, until/unless one files a return. i.e., it's the default. It shows up there initially for convenience of someone who hasn't filed. My account also showed that "Non-Filing" letter option for weeks until I actually did file, and the IRS began to process it. When they start processing, the transcript initializes, and they allow some of the basic 2024 transcript data to show up, then all the info. As @fanfare explained, they probably have just not started processing it and thus haven't initialized the transcript yet.
After I got my acceptance notice, the transcript didn't show up immediately. It took only a few days (maybe 4-5) for the 2024 transcript to update in my online IRS account and replace the "Non-Filing Letter" with an actual link for my 2024 transcript. The amount of time likely varies from person to person. I don't know if the IRS does it according to its cycle schedule or what. In any case, if you just efiled on April 15, I wouldn't worry about it. Check again every 2-3 days, if you wish, and you will probably suddenly find that's there's been a change.
