Are you saying that the Tax Summary report is showing wrong information? Or that your transactions in your registers are categorized incorrectly?
If the transactions are categorized wrong, can you remember when any of them were incorrrect? Typically, if categories have changed from what you entered, it's due to Quicken Cloud overwriting your edits. Do you have Sync turned on (in Preferences > Mobile Web & Alerts)? If yes, after you categorize downloaded transactions, do you do Accounts > Sync to Mobile?
@sallysims You didn't answer the question I asked about your Quicken Cloud Sync setting. Is it (and has it been ) set to On or Off?
Also: do you know roughly when the messed up categorizations began? It may be easier to revert to a backup data file, even if you have to re-download/re-enter/re-edit some recent transactions, but all your history is accurate.