I sold my vacation home after it was up for sale for over a year. Can I add utility costs and property taxes paid during the time it wasn’t being used by me to the cost basis of the home?

Withholding

An amount taken from income as a prepayment of an individual’s tax liability for the year. In the case of wages, the employer withholds part of every wage payment. Backup withholding from dividend or interest income is required if you do not provide the payer with a correct taxpayer identification number. Withholding on pensions and IRAs is automatic unless you elect to waive withholding.