In 2015, for the first time, most of my income was untaxed, so I paid all my taxes for the year when I filed.
In 2016, I have been and will continue to be employed full-time with taxes already withheld.
The IRS and state & city tax agencies told me I'll owe quarterly payments this year since most of my income was not subject to withholding last year.
I believe I am not obligated to make these payments after all, since all my taxes are already withheld by my employer.
What if anything do I need to do to update the IRS and state & city agencies on my situation to avoid penalties or interest?