dmertz
Level 15

Retirement tax questions

I originally mentioned in my answer only the $1k safe harbor, but, as you mentioned in your question, there is also a safe harbor of 100% of last year's tax liability.  Still, with a substantial increase in taxable income of $22k you might want to pay as much of your estimated tax liability by 1/15/2019 as you practically can so that you don't risk coming up short on funds to pay the remaining tax liability by April 15.  Also, don't forget about state taxes.