The Free Application for Federal Student Aid (FAFSA) is a tool students use to apply for more than $120 billion in federal funds. Unfortunately, each year many students miss out. A report from NerdWallet estimates that $1,861 per eligible high school graduate of free federal grant money went unused during 2014 because they did not complete a FAFSA.

Even if you don't think you or your child qualify for federal aid, filling out a FAFSA is important because it could be used to determine eligibility for nonfederal aid and private funds.

FAFSA available Oct. 1.

Previously, the FAFSA was not available until January. A recent change now makes the application available Oct. 1. This is because the 2018-19 FAFSA can be completed with your 2016 tax information.

Avoid FAFSA mistakes

Don't forgo federal student aid by making one of the following common filing mistakes:

	Mistake: Not reading the instructions or questions Tip: Answer all the questions, even if the answer is zero. If left blank, a question will be considered unanswered. Here are some quick tips: Write dollar amounts without cents. "You" and "your" refer to the student, not the parents. Provide parent information if you or your child is considered a dependent of someone else. Understand the definitions of key FAFSA language including: legal guardianship, parent and household size. Use the available FAQs and FAFSA Information Center.
	Mistake: Incorrect, incomplete or nonmatching data Tip: Complete the FAFSA online. Although you can complete the FAFSA on paper, it takes only three to five days to process when submitted electronically. The online version has built-in safeguards that identify and prevent many errors. Plus, the IRS Data Retrieval Tool can import information directly from your tax return. Logging in with a Federal Student Aid (FSA) ID will automatically load basic information (e.g., name, birthdate, and Social Security number), reducing the likelihood of typos. You'll even receive confirmation of receipt once you submit your online application.
	Mistake: Not filing on time Tip: Note the new October FAFSA filing start date and get the application submitted as soon as possible. The sooner you or your child gets started, the higher the likelihood of being awarded funds, since many are distributed on a first-come, first-served basis.

Remember, students need to complete a FAFSA each year because eligibility does not carry over and can vary based on circumstances. Students can use the FAFSA Web Worksheet now to gather and organize the data needed for their application, available at www.fafsa.gov.

If you have an Individual Taxpayer Identification Number (ITIN) rather than a Social Security number (SSN) you may need to take action now or you'll be unable to file a tax return for 2017. Here is what you need to know.

What to know about ITINs

ITINs are identification numbers issued by the U.S. government for individuals who do not qualify to receive a SSN. An ITIN can be used to file tax returns and is also a form of identification often required by banks, insurance companies and other institutions. Unfortunately, ITINs are also a source of identity fraud. To combat this, the 2015 PATH Act made substantial changes to the program. Now a number of ITINs will expire if not renewed by Dec. 31.

No ITIN, no problem. If you do not have an ITIN, but have a SSN, this expiration does not affect you.

	No tax return in past three years. ITINs that have not been used to file a tax return at least once in the past three years will automatically expire on Dec. 31.
	Specific middle digit numbers expire. The new law creates a rolling expiration date for all issued ITINs. The key number to look for is in this position: 9xx-XX-xxxx. If it's a 70, 71, 72, or 80, you'll need to renew it. Last year the middle digits of 78 and 79 expired.

Renew your ITIN

Don't wait until the last minute to discover your tax return has been rejected and your refund delayed because of an expired ITIN. To renew, fill out Form W-7 with the required support documents. To learn more, visit the ITIN information page on the IRS website, Individual Taxpayer Identification Number.

Knowing whether you can or can't expense a purchase for business purposes can be complicated. However, there are a few hard-and-fast rules to help you.

According to the IRS, business expenses must be ordinary and necessary to be deductible. That means they are common and accepted in your business, as well as helpful and appropriate. You'll need to maintain records (such as statements and ledgers) and supporting documents (receipts and invoices) to substantiate your deductions. Certain expenses are subject to extra requirements, as described below.

Travel expenses pertain to business trips and can include transportation to and from airports, your hotel and business meeting places. They also generally include lodging, meals, tips and other related incidentals.

Is socking away large sums in a tax-deferred retirement account ever a bad idea? It is when you exceed the annual IRS limits. Whether intentional or not, the penalties can be painful. Here's how overfunding occurs and what steps to take to fix the problem.

How overfunding happens

Overfunding retirement accounts happens more than you may realize. It can be the result of a job change that causes you to participate in two different employer retirement plans. Sometimes people forget they made IRA contributions early in the year and do it again later. Others forget that the IRA limit is the total of all accounts, not per account. The rules are complicated. Traditional IRAs can't be contributed to after age 70½, while Roth IRA contributions are subject to income limits. Plus all contributions are predicated on having earned income.

IRAs

The annual Roth and Traditional IRA contribution limit is $5,500 ($6,500 if age 50 or older). If you surpass this amount, you pay a 6 percent penalty on the overpayment every year until it's corrected, plus a potential 10 percent penalty on the investment income attributed to the overfunded amount.

The fix: If the overfunding is discovered before the filing deadline (plus extensions), you can withdraw the excess and any income earned on the contribution to avoid the 6 percent penalty. You will potentially owe a 10 percent penalty in addition to ordinary income tax on the earnings of the excess contributions if you're under age 59½. Often you can apply the contribution to the next year. If your issue is due to age (70½ or older for a Traditional IRA) or income limit (for a Roth IRA), consider recharacterizing your contribution from one IRA type to another.

401(k)s

The rules for correcting an overfunded 401(k) are a little more rigid. You have until April 15 to return the funds, period. The nature of the penalty is also different. The excess amount is taxable in the year of the overfunding, plus taxable again when withdrawn. So, you could pay the penalty multiple times on the same amount. And, in certain cases, overfunding a 401(k) could cause it to lose its qualified status.

The fix: If you suspect an overpayment situation, contact your employer as soon as possible. Adjust your contribution amount before the end of the year and try to get the problem resolved that way.