This message results when TurboTax transferred in from your 2022 tax file your basis from your 2022 tax return and you subsequently entered a different number (or even overwrote the carried-in number with the same number) when preparing your 2023 tax return.
If you had no intention of modifying the amount of basis carried in, your only option to eliminate the need to provide explanation is to clear your tax return and start over. Once you have overwritten what TurboTax carried in, even if with the same number, there is no way to make TurboTax believe that the carried-in value was not modified. The only other option is to provide an explanation that there is no modification to explain. (TurboTax should be able to recognize that the value has been returned to the carried-in value, but doesn't.)
