Hire a CPA, questions answered, problems solved. Best thing I ever did regarding handling financial matters and taxes
I would agree with the hire a CPA if you don't have the time to look into it yourself. Quarterly estimates are pretty easy to do online. I do it for the state and Federal taxes. I have to say as annoying as the whole tax code is this part of it is really easy. I like quarterly as I rarely have equal monthly earnings on my daytrading and I get a better feel on how much to withhold doing it every 3 months as opposed to guessing each month and probably over withholding.
The best a free info exchange can offer is a shot at being valuable. I looked up that old saying, looks like one of many things invented by poor people that helps them stay poor, expecting someone to solve their problems, discarding anything less of a full solution at no cost.
Probably depends on where you live and your tax rules. I think I would prefer to wait annually myself in the UK.