Just upgraded to Catalina now can not uses my excel, word, or ppoint! Any suggestions??

Update your third party software.

Office for Mac running macOS Catalina

If you have Office 2011 for Mac or before WILL NOT run.

Office 2016 for Mac needs to be v15.35 or later.

Update the software or try an alternative for word documents—

https://docs.microsoft.com/en-us/officeupdates/update-history-office-for-mac


The current Office for Mac; Office 365 or Office 2019 are OK with Catalina

https://support.office.com/en-us/article/how-do-i-upgrade-office-ee68f6cf-422f-464a-82ec-385f65391350

https://products.office.com/en-us/compare-all-microsoft-office-products?&activetab=tab:primaryr1


Alternatives:

Pages.app built into the macOS https://support.apple.com/pages

LibreOffice shareware/ https://www.libreoffice.org/download/download/