I had spent quite some time reading on the topic and had received both views that you should enter gross salary or income chargeable under head salaries under the TDS schedule.(this being the more dominant view) {including on www.caclubindia.com forum}
I decided to go with Gross Salary in the TDS schedule because of the following reasons:
1) In the pdf file - Instructions for filling the ITR - Schedule TDS (Pg 14 of 16), "Please enter the gross amount of payment or receipt in respect of which tax has been deducted or collected at source"
2) In the pdf file - Under XML schema - ITR Validation rules Version 1.4 dated 26/06/2019 (Pg 10 of 14), "The amount of Gross salary disclosed in "Income chargeable under the head ‘Salaries’ in Income details should be at least 100% of Salary reported in Schedule TDS1." - This category 'C' defect has been removed on 12/05/2019
3) Further as per the 24Q, TDS returns it is a normal practice to enter Gross Salary, therefore for an employee who has received 12 months salary - the prefilled details will include the Gross Salary details as per 26AS. Therefore it is advisable not to edit the gross salary values.
4) Further my understanding is the department uses the TDS Schedule mainly to cross check the TDS credit claimed by the assessee.
What is more interesting that i am using the Income Tax efiling Java Utility PR3 - After reading so much on the topic and finally making up my mind now even after mentioning the Gross Salary details in the TDS schedule - I am not getting the error. The only change I have done in the meantime is updation of Java.
There are my personal views and only after the returns are processed in some months will I be able to update on the repercussions of my decision. I do not claim that this the correct option.
I decided to spend some time on the topic because I guess when an individual is looking for answers he/she wants clarity and relevant information. Hope I have been able to remove the clutter.