Did you get a federal refund last year, or did you pay in?
If you got a refund that should be one of the loopholes to get out of paying quarterly estimated tax. It’s the one my tax guy used for me in 2006 when I did over 30k in 1099 work. It did suck cutting a monster check to the government at the end of the year though.
I did have to make an estimated tax payment to the state though since in 2005 I had to pay something like $50 back to the state.