Where did you buy the Desktop program? There are places that sell fake or used License Codes.
Amazon is listed as an authorized seller but only if it's sold and shipped by Amazon, see
https://ttlc.intuit.com/turbotax-support/en-us/help-article/intuit-product-orders/obtain-authentic-t...
bighometax is not an authorized seller. People have been having problems using the License Code.