How do advance tax paid get reflected in Form 26AS ?​
Once the Advance Tax is paid, it will be reflected on assessee's Form 26AS within 3-4 working days of making the payment.

The banks upload challan details to TIN in 3 working days after the realization of the tax payment online.
After the bank uploads the details of self -assessment/advance tax to TIN, it is automatically posted into assessee's Form 26AS.