How many exemptions may I claim from my job W4 if I have expenses from a side business?

Question

According to what I've read; if one (single person) has an income from a job AND a home-based or small business (with IRS assigned EIN) - that person may include additional exemptions on their employment W4 to reduce tax withheld from their employment pay check. How is the number of exemptions allowed determined? I can't find anything about this on the IRS site.

Answer 1

If you have additional income from a side business, you should be withholding MORE, not less.