The prior year state refund amount on your Form 1099-G Certain Government Payments (or the amount imported from your prior year TaxAct return) may differ from the actual refund you received. There are various reasons as to why this is.

Per the WI Individual Income Tax 1099-G and 1099-INT webpage:

5. I received a refund check for $400, but a different amount was reported as income to the Internal Revenue Service (IRS) on Form 1099-G. Is this a mistake?

Your Form 1099-G explains how the amount of refund to be reported to the IRS was computed.

The following items may increase the refund amount that you are required to report as income on your federal return:

• Donations you made on your tax return
• Sales and use tax due on out-of-state purchases
• Retirement plan and other penalties
• Amounts applied to next year's estimated tax
• Late filing fees
• Interest charged
• Penalties imposed

The following items may decrease the refund amount that you are required to report as income on your federal return:

• Earned Income credit
• Homestead credit
• Farmland preservation credit; schedules FC and FC-A
• Interest earned and paid as part of the refund check
• Amounts paid on current returns
• Veterans property tax credit

Note that any link in the information above is updated each year automatically and will take you to the most recent version of the webpage or document at the time it is accessed.