To deduct TDS correctly, it is essential to follow the guidelines and regulations set forth by the tax authorities. If an employer deducts less TDS than required, it can lead to issues for the employee. Under-deduction of TDS may result in the employee having to pay the remaining tax amount at the time of filing their income tax returns, potentially causing financial strain or penalties for the employee. It is crucial for employers to accurately calculate and deduct the correct amount of TDS to avoid any problems for their employees.