Homebuyer Tax Credit Further Explained

The following is information Lisa Hammond of Landmark Title (my favorite title company!) found through the Active Rain website:

"Any first-time homebuyers who believe they are eligible for all or part of the credit can modify their income tax withholding (through their employers) or adjust their quarterly estimated tax payments. Individuals subject to income tax withholding would get an IRS Form W-4 from their employer, follow the instructions on the schedules provided and give the completed Form W-4 back to the employer. In many cases their withholding would decrease and their take-home pay would increase. Those who make estimated tax payments would make similar adjustments."
WITHHOLDING EXAMPLES:
Note: The impact of estimated tax payments would be the same.
Situation 1: Sally plans her withholding so that her withholding is as close as possible to what she anticipates as her income tax liability for the year. When she fills out her 1040, her liability is $6000. She has had $6000 withheld from her paycheck. She also qualifies for the $8000 homebuyer credit.
Result: Sally's withholding satisfies her tax liability and reduces it to zero. She will receive a refund of the full $8000.

Situation 2: Nick and Nora file a joint return. Nick is self-employed and makes estimated payments; Nora has taxes withheld from her salary. When they compute their taxes, their combined withholding and estimated tax payments are $11,000. Their income tax liability is $9800. They also qualified as first-time homebuyers and are eligible for the $8000 refundable tax credit.
Result: Ordinarily, their combined estimated tax payments and withholding would make them eligible for a refund of $1200 ($11,000 - $9800 = $1200). Because they are eligible for the refundable tax credit as well, they will receive a refund of $9200 ($1200 income tax refund + $8000 refundable tax credit = $9200)

Situation 3: Charlie and Mary both have income taxes withheld from their salaries and file a joint return. When they file their income tax return, their combined withholding is $5000. However, their total tax liability is $7200, generating an additional income tax liability of $2200 ($7200 - $5000). They also qualify for the $8000 first-time homebuyer tax credit.Result: Charlie and Mary have been under-withheld by $2200. Ordinarily, they would be required to pay the additional $2200 they owe (plus any applicable interest and penalties). Because they are eligible for the refundable homebuyer tax credit, the credit will cover the $2200 additional liability. In addition, they will receive an income tax refund of $5800 ($8000 - $2200 = $5800). If they owed penalties and/or interest, that amount would reduce the refund.