He may be referring to your W-4 allowances.
The W-4 is an IRS form you complete to let your employer know how much money to withhold from your paycheck for federal taxes. Accurately completing your W-4 can ensure you don't have a big balance due at tax time. It can also prevent you from overpaying your taxes, putting more money in your pocket during the year.
For more information, click What
Is a W-4 Form?