when you remove earnings, you ask the custodian to calculate the earnings for the period in question.
The period in question does not include a 2022 contribution, since it is too late to remove earnings for 2022.
The custodian can calculate the earnings for 2023 contribution. the earnings depend on the calendar period the contribution is (or was) in the IRA.
You can also do the calculation yourself by consulting the IRS publication. This is error prone and you won't get a 1099-R with the correct taxable amount.
earnings don't go on Schedule D; that are added into 1040 Line 4b. that is the only form involved.
"April 15, 2023 - self (contributions for 2023 tax year made in 2023 + earnings tax withholding"
I don't know what you mean by "earnings tax withholding".
Disregard withholding which is a separate issue.
If you took the contribution only, the earnings are still in there and have to be calculated and removed.
If the earning come out to be negative, then taking the entire contribution results in an early withdrawal.
I 'm not familiar with how or whether the custodian can adjust for action you took on your own.
You can ask the custodian to calculate the earnings and inform you, then you take out whatever is still to be taken (i.e. earnings only as otherwise you will have taken too much, which is an early distribution, which has a penalty).
penalty on early withdrawal, has its own rules, not discussed (yet).
@msv1
