Deduction under U/S 16(iii) for a senior citizen retired on 31.12.2019 E Filing

I am a senior citizen and retired on 31.12.2019 and for financial year 2019-2020 my Form 16 shown an deduction under Professional tax (u/s(iii)) for Rs 1800.00 but after December 2019 I am a senior citizen and when in efiling site I choose Nature of employment as :_ Pensioner this tab is ineffective and the prefilled data shows as Nil . Do I continue with the same and do not claim this deductions. I think being a senior citizen and pensioner I am not eligible for this deduction. Need some guidance so that I can fill up my efile return.

I am really helpful in this forum and always got the right answer . 

Thanks for your valuable time. 

T Ghosh