Why do I have to pay estimated taxes for 2019?

Related questions

1. What is the difference between a 940 and 941?
2. Do I need to enroll in Eftps?
3. How long does it take to get an Eftps pin?
4. Does the IRS take credit cards?
5. What happens if you file 941 late?
6. What is an Eftps PIN number?
7. Can I pay my tax bill online?
8. Is Eftps Gov legitimate?
9. How do I file quarterly 940?
10. Should I pay estimated taxes?

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5. #least
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9. #income
10. #january
11. #payments
12. #march