Final answer:
The year-end balance for Company L's allowance for doubtful accounts will increase if the company estimates a higher percentage of accounts receivable will be uncollectible, as this reflects a higher anticipated loss.
Step-by-step explanation:
The year-end balance for Company L's allowance for doubtful accounts will be higher if Company L estimates that a higher percentage of accounts receivable will be uncollectible. This is because adjusting the allowance for doubtful accounts is based on the estimation of potential future losses from customers who may not pay their debts, rather than the actual write-offs or collections that have occurred. When a higher percentage of accounts receivable is estimated to be uncollectible, the allowance must be increased to reflect the greater anticipated losses, thus increasing the year-end balance of the allowance account.