Amended Return Questions – Treasury Interest Form 1099
Case: I helped a married couple file their 2025 individual income tax return this year. They filed as Married Filing Jointly (MFJ). The husband lived in Washington state for all of 2025. The wife lived in Virginia from January 1, 2025, through January 26, 2025, and then moved to WA to live with her husband for the remainder of the year.
For their original state returns, I filed a Virginia Part-Year Resident Return (Form 760PY) using the following residency periods:
- Husband: 1/1/2025–1/1/2025 (to satisfy the software requirement that both spouses appear on the joint federal return)
- Wife: 1/1/2025–1/26/2025
The wife recently informed me that she forgot to provide a Form 1099 issued by the Department of the Treasury. They would now like to file an amended return to report this additional interest income.
The Form 1099 contains the following information:
- Date: 12/19/2025
- Description of security: IAAAA Series I Savings Bond
- Box 3 – Interest on U.S. Savings Bonds and Treasury Obligations: $1,900
My questions:
- Based on the 12/09/2025 date shown on the Form 1099, does the $1,900 of interest income belong entirely to Washington, since the wife was a Washington resident at that time? Or should the interest be allocated between Virginia and Washington based on the amount of time she lived in each state during 2025?
- Do I actually need to file an amended Virginia return in this situation? I prepared a draft amended Virginia Form 760PY, and the only change is an increase to Line 1 (Federal Adjusted Gross Income) and Line 7: Income attributable to your period of residence outside VA. However, the Virginia taxable income and tax liability remain exactly the same as on the original return, resulting in no change to the tax due or refund.
Many thanks!
