Premium is online software. The only "upgrade" to Premium would be to upgrade from do-it-yourself software to Live Assisted or Live Full Service. Is that what you want to do?
LIVE ASSISTED
https://turbotax.intuit.com/personal-taxes/online/live/how-it-works.htm
FULL SERVICE
https://turbotax.intuit.com/personal-taxes/online/live/full-service/
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