The new Tax Cut and Jobs Act law passed in 2017 modified the deductions businesses can take.  These are the changes.
Capital Investing

Full expensing is allowed for short-lived capital investment on equipment and machinery for five years.  Increases Section 179 expensing from $500,000 to $1,000,000.  [Increases the phaseout threshold from $2,000,000 to $2,500,000.  Reduces asset lives for residential and nonresidential real property to 25 years.]

 

Expensing

Temporary 100-percent expensing for property placed in service after September 27, 2017, and before January 1, 2023.  80 percent expensing for property placed in service  after December 31, 2022, and before January 1, 2024. 60 Percent for property placed in service after December 31, 2023, and be- fore January 1, 2025.

 

Deductions Modified

-Interest:

Limits the deductibility of net interest expense to 30 percent of earnings before interest, taxes, depreciation, and amortization (EBITDA) for four years, and 30 percent of earnings before interest and taxes (EBIT) thereafter.

 

-FDIC:

Limits the deduction for FDIC premiums.  No FDIC deductions for organizations with total consolidated assets of more than $10 billion.

 

-Net Operating Loss (NOL):

Eliminates Net Operating Loss (NOL) carrybacks and limits carryforwards to 80 percent of taxable income.

 

Deductions Eliminated

-Unreimbursed expenses attributable to the trade or business of being an employee:

-Business bad debt of an employee

-Business liability insurance premiums

-Damages paid to a former employer for breach of an employment contract

-Depreciation on a computer a taxpayer’s employer requires him to use in his work

-Dues to a chamber of commerce if membership helps the taxpayer perform his job

-Dues to professional societies

-Educator expenses

-Home office or part of a taxpayer’s home used regularly and exclusively in the taxpayer’s work

-Job search expenses in the taxpayer’s present occupation

-Laboratory breakage fees

-Legal fees related to the taxpayer’s job

-Licenses and regulatory fees

-Malpractice insurance premiums

-Medical examinations required by an employer

Occupational taxes

-Passport fees for a business trip

-Repayment of an income aid payment received under an employer’s plan

-Research expenses of a college professor

-Rural mail carriers’ vehicle expenses

-Subscriptions to professional journals and trade magazines related to the taxpayer’s work

-Tools and supplies used in the taxpayer’s work

-Purchase of travel, transportation, meals, entertainment, gifts, and local lodging

related to the taxpayer’s work

-Union dues and expenses

-Work clothes and uniforms if required and not suitable for everyday use

-Work-related education

-Repayments of income received under a claim of right (only subject to the two- percent floor if less than $3,000);

-Repayments of Social Security benefits; and

-The share of deductible investment expenses from pass-through entities.

-Eliminates the domestic production activities deduction (section 199).

Eliminates the employer-provided child care credit.