I have created my Chart of Accounts and am trying to enter the closing balances from last year for Assets and Liabilities and Capital. I have read other questions and answers but cannot find how to insert the values into the proper accounts
Are you asking about migrating to Manager from another accounting system, or making the transition to a new accounting period after using Manager last year.
If the former, read the Guide about starting balances. If the latter, read about closing an accounting period. Either way, Guides cover it.