2 Points
Joined July 2022
I was having same problem. Filing ITR3. 80 TTA is embedded here inside the income tax website.
Go to Schedule VI-A section
Select Part CA and D
Do you want to add more deductions and Select 80 TTA from the dropdown and get the deduction applied.
Please note - I am not an expert and this is not an advice; please consult a CA for verification.