If the corrected 1099 resulted in lower taxes, there isn't any reason to amend - unless you want a refund.
The IRS requires you to report your income. You reported more income than actually received, so you met the IRS requirement .
It is even possible the IRS will catch the change in income (lower) and send you a notice proposing a lower tax. This would happen later in the year, when the IRS matches their copies of 1099's to what you reported on your return.
You can amend the return using a desktop version of TurboTax. See: How do I amend my 2020 return?
