Trust Account: Trust Form 1099-R has a Taxable Amount (box 2a)and Federal Income Tax Withheld (box 4). This is a final distribution. Do I show the entire 2a Taxable Amount in the "Distribution to Beneficiaries" or subtract the amount withheld from box 4 as the Distribution?
For a final distribution from a trust account, you should report the entire taxable amount from Box 2a of Form 1099-R in the "Distribution to Beneficiaries." The federal income tax withheld (Box 4) does not reduce the distribution amount; it is simply the tax already paid on behalf of the beneficiaries.
Box 2a on Form 1099-R indicates the taxable amount of the distribution. This is the portion of the distribution that is subject to federal income tax.
Box 4 on Form 1099-R shows the federal income tax withheld from the distribution. This amount has already been paid to the IRS on behalf of the recipient.
Note that because tax withholding cannot be passed through to the beneficiaries on Schedules K-1, if the trust is due a refund of some or all of the tax withholding the trust will need to remain open until the trust's tax refund is received and distributed to the beneficiaries.