Hi, I forgot to mention the process by which you'd pay the estimated tax; once you determine the amount of your projected liability given your current earnings/expected earnings and withholding so far, you can make your estimated tax payments online here: https://www.irs.gov/payments/direct-pay.
For the reason, just select estimated tax, apply payment to 1040ES, tax period for payment is 2023 (or whatever year you're paying for).
The deadline for estimated tax payments to be considered timely for 2023 are as follows:
1st quarter: 4/18/23
2nd quarter: 6/15/23
3rd quarter: 9/15/23
4th quarter: 1/16/2024
If you file your 2023 return by 1/31/2024, you don't need to make the 4th quarter estimated payment.
