If you don't pay the estimates and your withholding isn't any of the following you will be hit with underpayment penalties.
1) 2021 balance due after withholding is less than $1000
2) withholding covers 90% of 2020 tax
3) withholding is 100% (110% if 2021 adjusted gross income is over $150,000) of 2020 tax
See this for calculating 2020 estimated taxes - https://ttlc.intuit.com/community/tax-payments/help/can-turbotax-calculate-next-year-s-federal-estim...
See this for paying estimated taxes - https://ttlc.intuit.com/community/tax-payments/help/how-do-i-make-estimated-tax-payments/00/25875
If you don't pay the estimates and your withholding isn't any of the following you will be hit with underpayment penalties.
1) 2021 balance due after withholding is less than $1000
2) withholding covers 90% of 2020 tax
3) withholding is 100% (110% if 2021 adjusted gross income is over $150,000) of 2020 tax
See this for calculating 2020 estimated taxes - https://ttlc.intuit.com/community/tax-payments/help/can-turbotax-calculate-next-year-s-federal-estim...
See this for paying estimated taxes - https://ttlc.intuit.com/community/tax-payments/help/how-do-i-make-estimated-tax-payments/00/25875
Based on my own experience, if you send the IRS 20% of the gain, then come tax filing time you'll be fine. http://www.irs.gov/payments.
If your state also taxes personal income, then you should make an estimated payment to your state tax authority also. Send the state an amount equal to whatever the highest tax rate is for personal income by your state. The highest I'm aware of is around 8.5% in CA.
The highest I'm aware of is around 8.5% in CA.