Preparing an Aging Schedule to Estimate Allowance for Doubtful Accounts Enewered Note: For each of the dollar amounts that you enter into the table below, round to two digits after the decimal, for example, enter. 1.42 for 1.424, or 1.43 for 1.425. Check Preparing an Aging Schedule to Estimate Allowance for Doubtful Accounts Enewered Note: For each of the dollar amounts that you enter into the table below, round to two digits after the decimal, for example, enter. 1.42 for 1.424, or 1.43 for 1.425. Check