@ID5737800 , Namaste Anil ji
From your post what I get is:
(a) You , a US person ( Resident for Tax purposes ) with work visa (H1-B) , your spouse and son with dependent visa ;
(b) Your son went through a status adjustment to F-1 ( independent visa ) .
Thus , and because your son ( with a dependent visa had been a resident for all these years ), his F-1 adjustment does not make him an NRA. He also is not eligible for the exempt status. This is my first blush response -- I need to refresh my memory on exact wording of the relevant statute and rulings.
You should have no issue in claiming him as a dependent . Additionally , the Tax treaty between US and India ( article 21 ) to be treated same as US students in similar tax circumstances.
Please note that because you have been a long-term tax resident of the USA, there are IRS requirements you must meet if and when , you leave this country and return to India.
I will come back on the earlier issue.
In the meantime , is there more I can do for you ?
Namaste ji
pk
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