Which of the following is a common error travelers might encounter when using DTS?

A common error travelers might encounter when using DTS involves incorrectly entered expenses or missing receipts. This is significant because accurate reporting of expenses is essential for proper reimbursement and compliance with travel regulations. When travelers fail to enter expenses correctly or neglect to provide the required receipts for their expenditures, it can complicate the reimbursement process. Missing receipts may lead to unsubstantiated claims, and errors in amounts can result in over- or under-payment.

While other options describe plausible mistakes that travelers might face, the issue of expense entry and receipt retention is particularly critical in the context of financial accountability. Each of the errors listed can have implications, but ensuring accuracy in expense reporting is a foundational element of successfully using the DTS and receiving the funds owed to the traveler.