After some searching online, I found the following. It is for 2024. Should be similar for 2025. Since I sold my stocks in April, estimated tax is not due till the second quarter, or June.
Hope it helps others. Now the fine prints. No guarantee it is correct. Use this at your own risk.
-----------------------------
When are quarterly payments due?
Quarterly tax payments are due four times a year. According to IRS, a year has four payment periods with the following quarterly payment due dates: April 15, June 15, Sept. 15 and Jan. 15. If a date falls on a weekend or holiday, the deadline is the next business day.
In 2024, the due dates are:
- Jan. 16, for the income earned from Sept. 1 to Dec. 31, 2023
- April 15, 2024, for the income earned from Jan. 1 to March 31, 2024
- June 17, 2024, for the income earned from April 1 to May 31, 2024
- Sept 16, 2024, for the income earned from June 1 to Aug. 31, 2024
