Retirement tax questions

@DanaB27 

I did not directly make a Roth IRA contribution because I'm ineligible. The 14K contribution was made through Fidelity's mega backdoor Roth.

For more information:

https://www.fidelity.com/learning-center/personal-finance/mega-backdoor-roth

I contributed 14K after-tax fund to my 401K account and then converted to Roth IRA using Fidelity app.  I have not made any withdrawal. How do I report this type of contribution?

Thanks for the help.