Challan confusion in ITR B block return

Sir, the reason AY 2026-27 is not appearing in your selected screen is that for block assessment challan 311, the portal now requires selection through the Income Tax Act 2025 flow for TY 2020 onwards. In that option, the field is not normal current AY, but ‘Initial Tax Year of Block Period’. Therefore, please go to e-Pay Tax → Income Tax Act 2025 → Self-Assessment Tax for Block Assessment (311) and then select the Initial Tax Year of the block period.

One caution: if your case is an older block period linked to the earlier regime/search years, then the old 1961 flow may still be relevant, but based on the current portal manual, for TY 2020 onwards the 2025 flow is the intended one.