Iitr 2 including us salary

Aakansha, you can refer one tutorial on how to handle such foreign income case. See below link.

https://economictimes.indiatimes.com/nri/nri-tax/deputed-to-us-should-you-file-your-tax-returns-in-india-or-us/articleshow/12175803.cms

How to file, declare and compute totally depends on what is the residency status of your brother in India and US. With only 3 months os continuous USA stay, he is Non Resident of USA and Resident for India.

Additional links are here:

https://cleartax.in/s/claim-tax-credit-on-foreign-income-of-resident-indian

https://timesofindia.indiatimes.com/business/india-business/earning-abroad-know-the-tax-rules/articleshow/59853748.cms

https://cleartax.in/s/claim-tax-credit-on-foreign-income-of-resident-indian

All links are correctly opening and tested at my end. It seems some issue at your end if you are trying from mobile, or copying the URL link.

You can refer to the cleartax link.