It means that on March 1 the early prices expire and go up to full price. So you can pay the fees now to get the low price. The fees are determined at the time you file or pay.
See the Online fees here, See the prices crossed out?
https://turbotax.intuit.com/personal-taxes/online/
To pay now you can say you want to print the return before filing.
https://ttlc.intuit.com/community/printing/help/can-i-print-a-copy-of-my-turbotax-online-return-befo...
