another question about quarterly taxes...

[pokerraja]

I recently about 2 weeks ago received a letter from the IRS stating I have to pay my quarterly taxes by Sept 15th. I totally forgot about them til that point. My tax preparer did mention about them to me last april. I figured I could just pay them next april with my other taxes.

So, since I totally forgot the quarterlies till I got this notice from the IRS. How many quarterlies have I missed for this year so far? ( sorry seems like an obvious question). But what im trying to say is that this is the first notice I received from the IRS. Enclosed were two seperate stubs for me to pay for quarterlies.

Also, do i just pay 1/4th of what I paid total last year on my gambling winnings taxes? Even though im gonna make at least twice that this year? Sorry for newbie questions. Thanks to anyone who takes the time to respond. Much appreciated.