At the end of the year, Dahir Incorporated’s balance of Allowance for Uncollectible Accounts is $2,000 (debit) before adjustment. The company estimates future uncollectible accounts to be $10,000. What is the adjustment Dahir would record for Allowance for Uncollectible Accounts? (If no entry is required for a particular transaction/event, select "No Journal Entry Required" in the first account field.)