Comment cheapest way is to pay for stamps (Score 1) 60
To summarize:
dont use credit cards to pay taxes as you bill be charged as a shop owner
dont use software as you pay for it
use an accountant if your situation IS complicate enough.
personally I use my calculator, pen and paper. I usually end up around 4AM but avoid the round trips to paid preparers who always have more questions.
cheers.
mic