@skal Namaste ji
For the US Tax Year 2023 ( assuming that what is talking about ), you have allocate the incomes from Jan 1st through Dec 31st of 2023 --- it is easy to do for rental income, Interest and dividend. However, for the taxes imposed / levied / paid ( foreign taxes ) by India is a bit messy. Generally you have to use the average income tax from the tax year 2022 ( Apr. 01 2022 through Mar 31st 2023 ) for the months Jan, Feb and March and then use the average rate of tax from 2023 ( Apr. 01 2023 through Mar 31st 2024) for the months Apr. through Dec 2023.
As far as I am aware , IRS docs/ rules do not take this issue into account ( it is kind implied in talking about taxpayers/ entities with a tax year different than calendar year and use of accrued accounting basis ). The nearest reference is Instructions for form 1116 ( most direct ) and Pub 519 & Pub 54
Namaste ji
pk
