Hello,
Answering your query pointwise.
1. Yes, the details of other income to be considered that are reported by the employee to the employer are of two heads, Income from house property and income from other sources, both offered for TDS.
2. There is no boundness for the employer unless other details are reported by the employee to the employer. But if the employee doesn't provide details to the employer for Form 16 and directly report in the income tax return, then discrepancy will arise which may initiate an inquiry.
3. If an employee reports income from other heads and offer it for TDS and the employer doesn't cover it in his Form 16, even then there is no provision that holds the employer liable as an employee can show it in its Income tax return later and pay tax accordingly.
4. No, same as the 3rrd point reason.
5. An employee cannot himself pay tax through Form 16, only TDS from its salary can be deducted at that time. So again there is no provision that holds the employer liable. (Further, an employee can itself pay advance tax on his other income, and that income might not be offered for TDS in Form 16)
Further, it would like you to know that the new Form 16 is made effective from 12 May 2019. Thus, employers issuing Form 16 for the financial year 2018-19 after that date will have to issue in the new format.
I hope this answer satisfies your requirement.
Regards,
CA Hunny Badlani