Back Door Roth IRA and withdraw of Excess Contributions

This is a similar post to this post but has many different situations, so I'm a bit confused too.

https://ttlc.intuit.com/community/taxes/discussion/back-door-roth-ira-and-excess-contributions/01/3433547#M1267514

Background

Normally I do backdoor roth IRA through first deposit 7k to traditional IRA and then convert it to roth. 

Timeline

Feb 2024, I deposited 6.5k to the traditional IRA for the year of 2023 and a few days later converted to Roth IRA account.

March 2024, when I supposed to deposit 7k to traditional IRA, I mistakenly directly deposited 7k to the roth IRA account.

End of 2024, I realize I made the above mistake and deposited 7k to the traditional IRA

Jan of 2025, I converted 7k (deposited end of 2024) from traditional IRA to Roth IRA. And withdrew the 7k+3k gain from the Roth IRA account.

Meanwhile (2025), on my Schwab broker withdraw form I indicated the broker to take the 32% federal tax withholding and 5% state withholding. So on my bank account I did not get the full 3k gain but less. I guess it’s because both the federal and state tax has been withheld.

1099R: when I received the 1099R this year(2025), it only have 6.5k on it.

Here is the part that I need help.

1. Since I think the tax has already been withheld. Do I sill need to report the 3k gain?
2. If so, I saw in order to avoid amend the tax form next year, I need to manually input a 1099 R.  Do I input two 1099R, one for the traditional IRA account that has 7k on it and the other one for Roth IRA has 7k on Box 1 and 3k on Box2a?

• 3. On the Roth IRA part, do I say on turbotax that I contributed Roth IRA on 2024?

Thank you all for the help