Yes, it would be nice to have acknowledgement that all your efforts in preparing and sending off yearly stacks of information had, at least, been received, but it doesn't happen. As you said, there is the tool for "where's the cash you owe me", and I believe there is a method to trick it into responding for $0 returns, but I don't know how to do it. After waiting for a period of time (months?) there is a number you may call to see if your submission has arrived and is being processed. Check the IRS site.
Good luck with the filing. My suggestion would be to send anything via "tracked" and "signed for" (FEDEX, etc.) so you know it has arrived. It may cost a bit, but it does away with the anxiety. And remember, for the IRS, no news is good news. If there is any problem with the submission, they'll contact you. And yes, I know, that's easier said than done.