If you have been assessed an underpayment penalty,
then you can see if you may qualify for an exception to the penalty. You
may want to look into these exceptions if this is the first year you owed tax
and it is not a normal occurrence (i.e. you had one time income this year).
"Generally,
most taxpayers will avoid this penalty if they either owe less than $1,000 in
tax after subtracting their withholding and estimated tax payments, or if they
paid at least 85% of the tax for the current year or 100% of the tax shown on
the return for the prior year, whichever is smaller."
