after filing  tds returns with nsdl it will take 2 to 3 working days for getting update your 26AS... however it will get updated only when there are no miskates in the returns you filed with nsdl....

Hi,

Respective comapnies when file TDS return then nsdl site update it in 2-3 working days.

respective companies who have deducted tds should deposit the same with government and they need to file tds returns 

then u can view the same in 26as

however with in 15th may every one should file their tds returns

and deductor is liable to provide form16a for the respective quarter with in 15 days from the due date for tds return for respective quarter