Estimated Tax Estimated Tax Top Frequently Asked Questions for Estimated Tax Is an S-Corporation required to pay quarterly estimated tax? How do I know if I have to file quarterly individual estimated tax payments? Do self-employment taxes need to be paid quarterly or yearly? When are the quarterly estimated tax returns due? Leave a Reply Cancel replyYou must be logged in to post a comment. This site uses Akismet to reduce spam. Learn how your comment data is processed.