See this TurboTax support FAQ for how to complete a submission under the TurboTax 100% Accurate Calculation Guarantee or 100% Accurate, Expert Approved Guarantee? - https://ttlc.intuit.com/turbotax-support/en-us/help-article/intuit-account-billing/submit-claim-turbotax-100-accurate-calculation-100/L88SYklBL_US_en_US?uid=me4l0fmb