How to deal with error created by a turbotax bug after you file?

I filed unusually early this year, a couple of weeks ago in fact, and my return has already been accepted by the feds (I was unable to file my state taxes yet). I discovered after filing that a bug in turbotax had caused it to mis-report one of my sources of income (in particular, it reported only about a third of my rental income for the rental property I've owned since 1996; this is not something it's ever made a mistake with before).

 

How do I handle this? I tried to amend right away, but the 1040-X form wasn't going to be available for a couple of weeks (it was supposed to be the 19th, but when I checked on the 19th, the date had been moved to the 25th). In addition, I'm seeing advice in this channel saying not to file an amended return until *after* you get your refund. If I do that, I'll be liable for penalties and interest which will be because of the turbotax bug. As far as I know, Intuit won't pay those. I would much rather amend before April 15th (which is something I've done before; there are no penalties for making mistakes before the 15th).

 

Also is there a way to *report* a bug like this?