While the Tax Cuts and Jobs Act (TCJA) reduces most income tax rates and expands some tax breaks, it limits or eliminates several itemized deductions that have been valuable to many individual taxpayers. Here are five deductions you may see shrink or disappear when you file your 2018 income tax return:

If you run your business from your home or perform certain functions at home that are related to your business, you might be able to claim a home office deduction against your business income on your 2018 income tax return. There are now two methods for claiming this deduction: the actual expenses method and the simplified method.

Basics of the deduction

Limited liability company (LLC) members commonly claim that their distributive shares of LLC income — after deducting compensation for services in the form of guaranteed payments — aren’t subject to self-employment (SE) tax. But the IRS has been cracking down on LLC members it claims have underreported SE income, with some success in court.

The IRS opened the 2018 income tax return filing season on January 28. Even if you typically don’t file until much closer to the April 15 deadline, this year consider filing as soon as you can. Why? You can potentially protect yourself from tax identity theft — and reap other benefits, too.

What is tax identity theft?

The flat 21% federal income tax rate for C corporations under the Tax Cuts and Jobs Act (TCJA) has been great news for these entities and their owners. But some fundamental tax truths for C corporations largely remain the same:

A variety of tax-related limits affecting businesses are annually indexed for inflation, and many have gone up for 2019. Here’s a look at some that may affect you and your business.

Deductions

While the Tax Cuts and Jobs Act (TCJA) generally reduced individual tax rates for 2018 through 2025, some taxpayers could see their taxes go up due to reductions or eliminations of certain tax breaks — and, in some cases, due to their filing status. But some may see additional tax savings due to their filing status.

Unmarried vs. married taxpayers

This year, the optional standard mileage rate used to calculate the deductible costs of operating an automobile for business increased by 3.5 cents, to the highest level since 2008. As a result, you might be able to claim a larger deduction for vehicle-related expense for 2019 than you can for 2018.

Actual costs vs. mileage rate

While most provisions of the Tax Cuts and Jobs Act (TCJA) went into effect in 2018 and either apply through 2025 or are permanent, there are two major changes under the act for 2019. Here’s a closer look.

1. Medical expense deduction threshold

Now that 2019 has begun, there isn’t too much you can do to reduce your 2018 income tax liability. But it’s smart to begin preparing for filing your 2018 return.