Tax guide 514 states: If you use an accrual method of accounting, you can claim the credit only in the year in which you accrue the tax. You are using an accrual method of accounting if you report income when you earn it, rather than when you receive it, and you deduct your expenses when you incur them, rather than when you pay them. [i]In most cases, foreign taxes accrue when all the events have taken place that fix the amount of the tax and your liability to pay it. Generally, this occurs on the last day of the tax year for which your foreign return is filed.[/i] So, does that mean I CANNOT claim credit for April - Dec 2017 on the in-prep return?
