Mismatch in salary received in form 26as and form 16

You please fill according to actual figures applicable to you  as per salary slip, if form 16 is matching then its ok as its possible 26as is still not updated. 

You need to fill the figures based on your Form 16 as the same is the actual figures.

Fill the details as per form16. Was it that tax was deducted for only few months that is it was to say the 80 c deductions were shown at a later stage and hence tax was not required to be deducted then. In such case that difference may arise