Reconcile investment basis, estimated payments and unusual retirement transactions for the 2024 return. Keep beneficiary reviews on a separate task list.
March 24, 2025 · Financial Forte Staff
Historical article: prepared retrospectively using information available as of March 24, 2025.
Before filing a tax return, it is natural to focus on whether all the forms have arrived. A second check is equally useful: do those forms tell the full story? Missing investment basis, an estimated payment that never cleared or an IRA transaction with special treatment can change the result even when the document folder looks complete.
Review the 2024 tax records for accuracy, then keep related planning tasks on a separate follow-up list. Beneficiary designations deserve attention, but updating them is not a requirement for filing the income-tax return. Treat each task according to the decision it supports.
Check basis instead of assuming the form is complete
Basis helps determine the gain or loss when an investment is sold. A brokerage statement may report it, but transferred holdings, older purchases or adjustments can require supporting records. A missing figure is not an instruction to assume the entire sale proceeds are profit.[1]
In this hypothetical example, Ellis sold an investment for $40,000 during 2024. The tax form reports the proceeds but does not supply a usable basis figure. Ellis locates records establishing a $28,000 adjusted basis, assuming no other changes are required for this illustration.
The resulting gain is $12,000, before considering other tax-return interactions. Treating all $40,000 as gain would overstate that amount by $28,000. The tax rate still depends on the holding period, income and other applicable facts; the basis calculation is only one step.
Do not guess from the price you remember paying. Reinvested distributions, certain corporate actions and prior adjustments can affect basis. Ask the institution and preparer which records are needed, and preserve the explanation and source records used to support the reported figure, so a future transfer does not lose the same history again.
IRA basis is a separate subject. Prior nondeductible contributions can require Form 8606 and affect the taxable portion of distributions or conversions under the applicable aggregation rules. An after-tax amount in one account should not simply be subtracted from a withdrawal without the proper calculation.[2]
Reconcile tax payments with confirmations
List federal and state withholding, estimated payments and any prior-year overpayment applied forward. Use actual confirmations and account records rather than the amount written in a planning worksheet. A payment scheduled but rejected or canceled is not the same as a completed payment.
Suppose Ellis's planning file shows four intended federal estimated payments of $2,000 each, totaling $8,000. The bank and tax-account review confirms only three completed payments. The verified total is $6,000, leaving a $2,000 difference to resolve with the preparer. Identify which intended payment is missing rather than reducing an unexplained total without a record.
That discrepancy does not by itself establish the final balance due or any penalty. The complete return, withholding, timing and applicable rules determine those results. It does mean the return should not claim an $8,000 payment total solely because that was the plan.[2]
Confirm the tax year and taxpayer information attached to each payment. A correctly transferred amount applied to the wrong year or account can require follow-up. Keep the supporting record and ask how to address the issue before substituting an unsupported number.
Review withholding forms for gross distributions as well as the cash received. If a retirement distribution had tax withheld, the deposit into checking will be smaller than the gross amount. The preparer needs both the income and payment information to report the transaction correctly.
Explain transactions that need more than a form
Tell the preparer about qualified charitable distributions, rollovers, Roth conversions and unusual account transfers. Provide the receiving-account or charitable records when relevant. A transaction description in an online account may not contain everything needed to determine its tax treatment.[2]
If a form appears incorrect, contact the issuer and coordinate with the preparer. Keep track of whether a corrected version is expected. Do not quietly alter the document or assume a remembered intention overrides what the institution actually processed.
Also review the carryforward records that can affect this year, such as capital losses. Moving to a new preparer or changing software can make those details easier to miss. The current year's forms may be accurate while the return still lacks a relevant prior-year item.[1]
Make a short list of unresolved questions and assign each to the person who can answer it. The objective is to resolve material uncertainty before filing or to follow the appropriate filing and payment process if more time is needed. A filing extension generally does not extend the time to pay.[2]
Use the document review to identify planning follow-ups
While account records are open, confirm that you know where beneficiary information and estate documents are maintained. A marriage, divorce, death or changed family responsibility may justify a review with the relevant institution and attorney. Plan rules, spousal rights and legal restrictions can affect the appropriate action.[3]
Keep that work separate from the tax-filing checklist. Ellis can complete the return once the necessary tax facts are resolved while arranging a beneficiary review through the proper process. One important task should not be misrepresented as a condition for the other.
After filing, compare the return with the current year's income expectations. A one-time 2024 gain may not recur in 2025, while a new pension or planned conversion may create a different need for withholding or estimated payments. Do not copy last year's payment pattern without checking what changed.
Begin with basis, payment confirmations and unusual transactions. Then turn the remaining planning questions into specific follow-ups with an owner and a date, including beneficiary work through the appropriate institution. A careful final review supports an accurate return and gives the next financial-planning conversation a more reliable starting point.
Related reading
- Check Retirement Tax Withholding Before Year-End Gets Busy
- Tax Filing Extension or Payment Extension? Know the Difference
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Educational information, not personalized investment, tax, legal or benefits advice. Examples use hypothetical assumptions. Verify current rules and your circumstances before acting.
Sources
- [1] IRS Publication 550: Investment Income and Expenses — March 8, 2024; 2023 edition
- [2] IRS 2024 Instructions for Forms 1040 and 1040-SR — December 16, 2024 cover; PDF January 3, 2025
- [3] What You Should Know About Your Retirement Plan — September 2021 edition; IRS Publication 504: Divorced or Separated Individuals — December 12, 2023; 2023 edition

