If couple send money to an separate account under my name to maintain savings am I still need to declare the money in tax? Will I be liable to pay tax since the account is under my name?

We both are foreigners. Inorder to make a disciplined savings monthly we use to send 30% of our salary to an account under my name as savings. Since the bank account is under my name should I declare my wife contribution to iras? am I taxable for my wife 30% contribution to that savings account?