Yes, you are supposed to pay estimated taxes if you expect to owe more than $1,000 in tax. This is a very rough eand shouldnu2019t be taken as fact, but $1K in tax roughly equates to $7,000 in net earnings over the course of a year (excluding any type of W-2 income from a normal job).Estimated taxes are due four times per year, payments are not exactly quarterly though. The IRSu2023 website has the due dates of each payment. To file, youu2019ll need to fill out Form 1040-ES: https://www.irs.gov/pub/irs-pdf/.... The form has instructions on how to pay.Another useful resource is this freelancer tax calculator: Freelancer Income Tax Calculator 2016.