Although you may have entered $34,313 total, many itemized deductions are limited by a percentage of Adjusted Gross Income (AGI - a subtotal on your return). Things like employee job expenses are limited by 2%, medical expenses by 10%, losses by $100 and 10% of AGI, charitable deductions have alternative limitations, miscellaneous deductions by 2% etc.
Also if your AGI exceeds limitations, your itemized deduction may be reduced making the standard deduction the greater option (311,300 if married filing jointly or qualifying widow(er), $285,350 if head of household, $259,400 if single, or $155,650 if married filing separately).
Let me know if you have more questions on specific itemized deductions.
