Answer:
Sales Discounts 190 debit
  Allowance for Sales Discounts  190 credit
Explanation:
From the current accounts receivable, the company has 10,000 within discount period and t expect the customer will take them so:
10,000 x 2% = 200 expected discount
currenly the accouting balance for the expected discount is 10 so:
200 - 10 = 190 allowance for sales discounts adjustment.
Remember we do this adjustment to match the expenses or discount withthe period they are generated. Not doing so, will imput discount to the next period for transaction which occurs in the current one.