The basis for your Traditional IRA is the total non-deductible contributions that were made to the account. This does not include any earnings that the account has accumulated since money was contributed to the IRA.
So, if you actually contributed $6000 for 2021 and $6000 for 2022 during the calendar year of 2022, then your basis as of December 31, 2021 would be $0 since there was nothing in the account at that time. The $6000 non-deductible contribution for 2021 should have been reported on your 2021 tax return that you filed in early 2022. The $6000 non-deductible contribution that you made for 2022 needs to be reported on your 2022 tax return that you are filing now.
Based on what you have shared, your total basis should stand at $12,000 for the Traditional IRA, assuming no non-deductible contributions were made prior to 2021. That means that the difference in what you converted (roughly $23,000) and your basis constitutes earnings made in the Traditional IRA account between the time the money was contributed and converted to the Roth IRA. This amount will be taxable on your 2022 return.
The non-deductible contribution that was made in early 2023 will be reported on your 2023 tax return. You should also receive a 2023 Form 1099-R to report the 2023 distribution from the Traditional IRA and subsequent conversion to Roth IRA.
On a side note -- the users here in Community do not have access or the ability to contact you through Zoom or other means. If you need further assistance, take a look at the following TurboTax help article: What is the TurboTax phone number?
@Monroe08
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