@donald.marvin You are correct. Thank you for adding this information. Due to the need to override some Form 4684 line entries, when using the Cost Indexes Safe Harbor method, the tax return will need to be mailed in. See this TurboTax FAQ on how to perform an override in TurboTax desktop versions: <a rel="nofollow" target="_blank" href="
https://ttlc.intuit.com/replies/3299946">https://ttlc.intuit.com/replies/3299946</a>.
