Hello @Amanda .
It's nice to have you in the Community. I'm here to help route you to the right support that can assist in correcting your historical data for the retirement contributions.
We can't access your account since this is a public forum. Our Online Payroll Support has the necessary tools to locate those contributions that were off and can make the adjustments if needed to fix your W-2s. Here's the link to get their contact information: https://payroll.intuit.com/support/contact/?priorityCode=4100000000&DPSLogout=true.
Let me know how it goes. I'll be here to help if you have other questions about your payroll. Have a good one.