Excess HSA Contribution Problems Due to Medicare Enrollment-6 Month Rule

Hello,

 

In April 2024 my wife filed an application for Social security benefits (she will be 70), which she supposed to receive in July 2024. Because of this, she was automatically and retroactively enrolled in Medicare part A. She is still working and has been contributing to her HSA account until the end of March 2024. We had no idea, that she should has stopped contributing to her HSA 6 months before applying for SS. We asked her HSA administrator to send her a check for excess contributions dating back to January 2024 thinking that the 6 month period would start in January.  A few days ago her application for SS benefits was approved by the Social Security Administration, but it shows that her Medicare Part A coverage started in October 2023 not in January 2024 as we originally thought (benefits start date July 2024).

 

My questions:

 

1. Does she have to file another excess contribution form for October-December 2023 period?

2. We already filed 2023 joint tax return, do we have to file an amended 2023 tax return or is there any other easier way to correct this issue?

3. Is her employer going to issue corrected W-2 forms for year 2023, since the amount in Box 12 code W would change?

4. Does she have to pay any excise tax or penalties?

5. If we have to file an amended tax return, do we have to file the state return also?

I don't believe that our state taxes will be affected by this change.

Thank you,