I already submitted

[TXax22]

I already filed taxes and got a refund. I think I did it wrong. Can I redo it on another site?

[DoninGA]

To change a tax return that has already been filed you must Amend the tax return.  If this is for a federal tax return you have to use Form 1040-X to amend the filed tax return.

You can use TurboTax to amend the return, complete the Form 1040-X manually or have a local tax professional assist you in completing the amended return.

See this TurboTax support FAQ for amending a 2021 return - https://ttlc.intuit.com/community/tax-return/help/how-do-i-amend-my-2021-return/00/2544441

[VolvoGirl]

Maybe.  You need to do an Amended 1040X return.  You will need to start with the amounts from the original return.  It will probably cost you to go somewhere else.  You can amend on Turbo Tax for free and even efile it.

https://ttlc.intuit.com/community/tax-return/help/how-do-i-amend-my-2021-return/00/2544441 

What was wrong?  Did the IRS send you less?  You might not need to fix anything.