Comment by fsckboy

i did it by hand till 15 years ago. created a spreadsheet, with only the items I needed.

the next year, pretty much the same spreadsheet with whatever minor tax changes had been made for that year.

the 15 hours is mostly spent getting your shit together which you have to do for an online solution too.

I did a better job than my accountants do, they often forget little details that I would keep track of. ("no, I did not owe a penalty, the estimated payments and refund carried forward meant there was enough money on my tab...")