
Originally Posted by
kcowan
BUt you can set the amount of withholding to whatever you think is adequate based on your total expected income. IOW at less than rates for salary would indicate to compensate for special situations. As long as the amounts are adequate to get you close enough to the actual amount owing, there is no penalty.
(I had the opposite problem where I set it above the required amounts to compensate for commission income that put me into a higher tax bracket, to avoid penalties.)