Any of the 2020 desktop editions can be used to amend a tax return originally completed and filed using the 2020 online editions.
See this TurboTax support FAQ for amending a 2020 tax return - https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-2020-return/L3XdA1Pw8_U...
