Guess what inspired this?

I'll update as I slog through my civic obligation.

(UPDATE #1)
After squeezing as many work miles and tool costs, I went from a $21,000 profit fro a six month stint at Mega-cable company to $14,000 and a $1978 tax bill.

(UPDATE #2)
Anybody have an idea at what I'd be looking at for penalties on $1600 of ummm..... unpaid tax estimates? Are we looking at like 10% or closer to, like a 50% penalty on what I already owe?