Section 248 of the Income-tax Act, 1961 provides a mechanism for a person who is required to deduct tax at source to appeal against the order of an Assessing Officer if they deny their liability to make such a deduction. This section is significant as it allows the deductor to challenge the imposition of tax deduction at source (TDS) obligations that they believe are not applicable. The statutory test involves the deductor demonstrating that the conditions for TDS are not met. The burden of proof lies with the deductor to establish that they are not liable to deduct tax. Practically, this section is crucial for entities that face TDS demands on transactions they believe are exempt or not covered under TDS provisions, allowing them to seek relief through the appellate process.