What would the withholding tax be for 536.30?

Withholding tax comes in various forms and types:

The 2 most common are for payroll, where tax is withheld and sent to th appropriate jurisdictions - Federal, State, City and even local - depending on what is needed for that particular income. The income taxes are sent to the tax jurisdiction and placed in an account entirely for the benefit of the employee. They are an estimated payment on tax that will be calculated at year end. (Additionally, other payroll requirements of things like FICA, Unemply Insur, FUTA, Workers Comp, etc., etc. may be withheld fro the pay given the employee). THIS TAX IS ENTIRELY IN THE CONTROL OF TE EMPLOYEE/TAXPAYER and just like the tax that will be due at the end of the income period it is an estimated payment on, because of all the variables in calculating tax (like single or joint filing, number of dependents, mortgage interest payments, IRA/401k contributions, etc., etc., etc), there is no specific or even right/required answer to your question.

There is also another withholding - called "backup" withholding. It is generally used only for foreigners who may try to avoid paying tax on US source income, and those who faile to provide SS#s or may have had problems reporting income on their annual return in the past. It requires that 20% of any payment (say interest on investments, or even rents, etc) be withheld and paid to the US on their behalf. In which case $107.26 of this amount would be submitted.