Will my sister's income help in the loan application if she is earning but has no ITR in UK?

It depends. Your sister’s income can help with your UK student loan application, even if she does not have an Income Tax Return (ITR), as long as she can provide alternative proof of income.

Lenders may accept:
- Salary slips showing her earnings
- Bank statements (typically 6 - 12 months) with regular salary deposits
- Employment certificate confirming her job and salary

Requirements vary by lender. Some may insist on an ITR, while others are flexible with alternative documents. If your sister’s documentation is not accepted, you may need a different co-applicant who meets the lender’s criteria.