What is a service code - https://ttlc.intuit.com/turbotax-support/en-us/help-article/intuit-account-billing/service-code/L0HwCyI4x_US_en_US?uid=mapmjaf7
Where do you enter a service code - https://ttlc.intuit.com/turbotax-support/en-us/help-article/intuit-account-billing/enter-service-code/L5hWeDkAa_US_en_US?uid=mapmke7e
See this TurboTax support FAQ for contacting support - https://ttlc.intuit.com/turbotax-support/en-us/help-article/account-management/turbotax-phone-number/L0Od33nMQ_US_en_US?uid=lfgviwbm
Or—-Use this IRS site for other ways to file for free. There are 8 free software versions available from the IRS Free File site
https://apps.irs.gov/app/freeFile/
Or—if you live in certain states you may be eligible to use the new IRS Direct File
In Filing Season 2025, Direct File will be available in Alaska, Arizona, California, Connecticut, Florida, Idaho, Kansas, Maine, Maryland, Massachusetts, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, Oregon, Pennsylvania, South Dakota, Tennessee, Texas, Washington, Wisconsin, and Wyoming.