Hello and thank you for your question. The advantage of paying self-employment taxes quartely is that you avoid penalties and you avoid paying a lump sum at the end of the year. Sometimes you might have zero Federal Income tax but you might have Self-employment tax. The self-employment tax is the social security and medicare as employee and employer from your net income on your business (Schedule C). It is 15.3% (12.4% SS + 2.9% Medicare) of your net income. You can find more information at A Guide to paying quartely taxes at https://turbotax.intuit.com/tax-tips/self-employment-taxes/a-guide-to-paying-quarterly-taxes/L6p8C53....
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