Why was my refund more than what I filed?

[SweetieJean]

Did you forget to claim credit for an estimated tax  payment, or a 2017 refund applied to 2018 taxes?

[CassandraLO]

The government may have made a correction to your tax return, resulting in a higher than anticipated refund. You should be getting a letter from the government explaining why. You can also get this information by looking up your refund at the IRS Where's My Refund page.