It all depends on how your income is structured. If you have a salary, your taxes are withheld and paid as you go. If you have other income you either pay for that quarterly or you increase your salary withholding to cover it. If your other income is not regular or you can't forecast it, increased withholding could be too much or too little.

My accountant told me that as long as I come within a few percent of last year's tax due, you won't get a penalty if you owe more this year. The question is how much is a few percent?

I have never worried about it. I increase my withholding to cover my forecast estimate. Sometimes I owe. Sometimes I get a refund. If there are penalties they have been small so they don't make a big difference. But then my income and taxes are not large.

Yep - Fuel, Air, Spark. You don't have all 3, the motor, she no run!
Skeeters (and scorpions) - I Hate 'em! 10,000 sweaty fans in a football stadium - and the skeeters'll eat me!
8 years ago some friends and I took the war to the bugs with a mist blower, Talstar P and Pivot 10.
2 years ago - the motor, she no run. Spark Plug was carbonized. Once replaced, back in business :)
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This year - the motor, she no run. Spark Plug essentially new BUT! The Gas Priming Bulb has a hole in it!
Instead of pulling gas, the engine was pulling air into the carburetor through the hole.
I removed a couple of screws and now could access the miscreant primer bulb.
Quick check on amazoid ==> 2 choices: one 19mm dia and the other 20.
Bulb circumference = 65mm, divide by 3.1415 = 20.7. Order Up!
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Replacement arrived this afternoon. Put the new one in, engine primed and fired right up :)
Skeeters - - yer done for !!