The clock is ticking: there are less than two weeks until Tax Day.

If you haven't filed your return yet, you're not alone.

The Internal Revenue Service reported that it received nearly 81 million returns as of March 24. In total, the IRS said more than 168 million individual tax returns are expected to be filed this year "with the vast majority of those coming before the April 18 tax deadline."

If your return contains no errors or red flags, your refund should be delivered within 21 days if you file electronically and opt to have the money directly deposited in your bank account, the IRS said.

But if you're scrambling to finish your tax return by April 18, you should file an extension immediately before it's too late.

How to file an extension: If you can't make the April 18 tax deadline, file an extension now. Here's what to know.

Laid off last year?: What you need to know about filing your tax return after a layoff

When is the filing deadline for 2023?

Taxes are due by April 18 since April 15 falls on a Saturday and Emancipation Day, a holiday observed in Washington, D.C., is April 17.

What is OASDI tax on my paycheck?: Here's why you and your employer pay this federal tax

Are you ready to file your taxes?: Here's everything you need to know to file taxes in 2023.

Arkansas tax deadline

If you live or own a business in an area of Arkansas that was impacted by last month's deadly tornadoes and severe storms, you'll have until July 31 to file your taxes.

Alabama tax extension

If you live in parts of Alabama affected by recent storms and natural disasters, you'll have until October 16 to file your federal individual and business taxes.

Tax Day 2023 California

If you live in parts of California affected by recent severe winter storms, flooding and other natural disasters you'll have until October 16 to file your federal individual and business taxes. The IRS initially postponed the deadline to May 15.

Georgia tax filing deadline 2023

If you live in an area of Georgia that was impacted by recent natural disasters, you'll have until October 16 to file your federal individual and business taxes. The IRS initially postponed the deadline to May 15.

Mississippi tax extension

The IRS extended the date taxes are due for people who live in certain parts of Mississippi affected by recent storms to July 31.

NY tax deadline

If you live or have a business in parts of New York that were impacted by the severe winter storm late last year, you'll have until May 15 to file your federal individual and business taxes.

Deadline for filing income tax returns that have received extensions

If you request an extension, you'll have until October 16 to file your return. Importantly, that doesn't buy you more time to pay your taxes. You'll still have to pay any amount due to avoid penalties, but you'll have more time to complete your tax forms.

FAQs on tax extensions: How to file one and more

1099, W-4, W-2, W-9, 1040: What are these forms used for when filing your taxes?

1099 deadline

If you're a freelancer, independent contractor, or earn income from other sources outside of a traditional job, you should have received a 1099 tax form by Feb. 15. The same applies to people who won at least $600 in prize money last year.

W-2 deadline

Your employer is required to have sent you a W-2 by Jan. 31.

Tax refunds: Americans could see smaller tax refunds in 2023, IRS warns. Here's how to get every penny

IRS delays $600 1099-K reporting: Applies for people who earn money through Venmo, PayPal, CashApp and more

Should we file taxes jointly or separately: A guide for couples who said 'I do' in 2022

This 2023 tax credit could help: Interested in purchasing an electric car?

Quarterly tax due dates

If you earn income that isn't subject to withholding taxes, you're typically required to make estimated tax payments to the IRS. You can do this on a quarterly basis or through one annualized estimate. The annualized estimate is due on April 18.

The quarterly payments for 2023 are due by the following dates:

• First payment: April 18.

• Second payment: June 15.

• Third payment: Sept. 15.

• Fourth payment: Jan. 16, 2024.

More of your 2022 tax season questions answered

• 1099, W-4, W-2, W-9, 1040: What are these forms used for when filing your taxes?

• What are the 2022 US federal tax brackets? What are the new 2023 tax brackets? Answers here

• 2023 tax season guide for new parents: What to know about the Child Tax Credit, EITC and more

• IRS may owe you from 2020 taxes. Here's why and what you need to do to find out if you're owed

• What is OASDI tax on my paycheck? Here's why you and your employer pay this federal tax

• Do you have to report crypto on taxes? Yes. Here's what you should know about form 8949

• What is a 1098-E form? What you need to know about the student loan interest statement

• Tax season 2023: What exactly is the mileage rate? There's more than one.

• Is it better to pay someone to do your taxes or do them yourself? We'll help you decide.

• What is income tax? What to know about how it works, different types and more

• Is Social Security income taxable by the IRS? Here's what you might owe on your benefits

• Companies can deduct full cost of business meals on 2022 tax returns

• Who has to file a tax return:  It's not necessary for everyone. Here are the rules.

• What is capital gains tax in simple terms? A guide to 2023 rates, long-term vs. short-term

Elisabeth Buchwald is a personal finance and markets correspondent for USA TODAY. You can follow her on Twitter @BuchElisabeth and sign up for our Daily Money newsletter here

This article originally appeared on USA TODAY: Tax season 2023: When are taxes due? When will I get my refund?