11. Estimated tax is required when ______.

1. The taxpayer expects withholding and credits to cover less than 90% of the tax on their 2021 tax return or 100% of tax on their 2020 tax return of owe $1,000 or more in tax for 2021 after all deduction and credits.
2. The taxpayer has self-employment income over $400.
3. The taxpayer expects to owe $5,000 or more in tax for 2021 after all deduction and credits.
4. The taxpayer expects withholding and credits to cover less than 90% of the tax on their 2021 tax return or 75% of the tax on their 2020 tax return.