Step 1) Go to Master > Account Master > Account Master.
Step 2) After that open new account under Capital > Select the Group Head as Reserves & Surplus , Capital (Equity) and Partners’ Capital
Step 3) After that select the Capital button and select the Partner or Proprietor as per the business ownership.
Step 4) Then after selecting add partnership % and then open another partner account make that 100%.
Step 5) For the Proprietorship add 100% in the Capital option.

Note: If Partnership is not 100% not allowed to change year make sure all the partners capital % total will be 100 %.