does turbotax support amended returns?
See https://turbotax.intuit.com/tax-tips/amend-return/how-to-file-an-amended-return-with-the-irs/L6kO691J8
and
https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-change-correct-return-already-filed/L4VjJ9BA2_US_en_US
Did you use TurboTax to file the original return? What tax year are you wanting to amend? What are you trying to change? If you just filed a 2021 return, you need to wait for the IRS to process it fully before you amend.