Gosh, Mr. Peabody, if Edgar Allan Poe doesn't marry his 13 year old cousin, he'll never be sent into depression from her death which will mean he'll never get the inspiration he needed for his stories!!!
2:23 "In the dim light, we saw that we were NOW in a chamber of horrors! " Sherman: "Mr. Peabody! Do you see what I see?" Mr. Peabody: "Implements of torture Sherman! An Iron lady, the rack, a spiked boot and.... A TELEVISION SET! The most fiendish form of torture known to man!"
Even if the IRS existed at that time I don't think Poe ever in his life made nearly enough money to be scared by those extortionists trying to threaten him with an audit etc.
The Wayback Machine must have taken Peabody into an alternate universe. In our universe, there was no personal income tax till 60 years after Poe had died.