Most filing delays are not about the maths. They are about waiting on one more document. A clear checklist up front saves a lot of to and fro later.
Here is the short version to send your clients.
Income
- Form 16 from each employer.
- Bank statements for the full year, plus interest certificates.
- Capital-gains reports from any broker: shares, mutual funds, F&O.
- Dividend statements.
- Rent received, if they let out property.
Tax already paid
- Form 26AS.
- AIS / TIS.
- Form 16A for any non-salary TDS.
- Advance-tax or self-assessment challans.
Deductions
- 80C proofs: PF, ELSS, insurance, tuition.
- Home-loan interest certificate.
- Health-insurance premium for 80D.
- Donations and any other claims.
Once it's all in
When your client sends all this back, you can add the whole set to CA Helper and get a ready computation, instead of opening each file and typing figures one by one. The checklist gets the documents in. CA Helper turns them into a return you can review.