The refund amount changing could mean that the IRS or your state adjusted your return based on information that they had that is different than what you reported. Generally, the state or the IRS will send a letter notifying you of the changes.
Please click the link below to learn why the TurboTax meter may have changed. https://ttlc.intuit.com/community/troubleshooting/help/why-did-the-turbotax-refund-meter-change-after-filing/00/26434