Query on issue date for Form16/ Form 16A

In a company TDS amount is credited on the last day of the year i.e,.31 March.

a) Last date for issue of Form 16/ Form  16A  is 7th june. (2 months 7 days from the end of the year)in the above mentioned case.

If you have doubts regarding above date kindly refer point 21 in the chart given at

https://www.incometaxmumbai.nic.in/taxpayer/tds.htm

b)Last date for e TDS return of Jan-March is 15 June

My question is

how can one issue Form 16/Form 16A on 7th june (which is the last date for issue of such form) if e-TDS return is filed on 15 June(Last date for filing such return) because  on 7th june one will not be having e-TDS acknowledgement number that is to be filled in Form 16 /Form 16A

Thanks.