Form 720 Schedule A Explained
Form 720 Schedule A is a record of when your tax liability arose during the quarter. It sits on page 4 of the form and breaks your Part I taxes into semimonthly periods, the 1st through 15th and the 16th through the last day of each month. It shows the IRS your liability period by period, which is what your semimonthly deposits are measured against.
It doesn’t add a tax. It only spreads the same Part I liability across the calendar.
Who has to complete Schedule A, and who doesn’t?
| Your situation | Schedule A? |
|---|---|
| Part I liability above $2,500 for the quarter | Yes |
| Part I liability of $2,500 or less, with no deposits required | Yes. The instructions say to complete it even if net liability is under $2,500 |
| Part II taxes only, such as the PCORI fee, indoor tanning, or sport fishing | No |
| One-time filing of the gas guzzler tax (IRS No. 40) | No |
The second row catches small filers, who assume that no deposits means no schedule. For e-filed returns, the IRS rules check this directly. Rule F720-155-03 rejects a return with tax on listed Part I lines and an empty Schedule A unless the one-time gas guzzler box is checked. Rule F720-030-01 works the other way: with that box checked, Schedule A must be empty.
Regular method versus alternative method: which boxes?
The schedule has two blocks of boxes, one for each way of tracking tax.
| Point | Line 1: regular method | Line 2: alternative method |
|---|---|---|
| Applies to | All Part I taxes, including communications and air taxes reported on actual collections | Only communications and air taxes (IRS Nos. 22, 26, 27, 28) based on amounts billed or tickets sold |
| Boxes | A through G | M through S |
| What a box holds | Net tax liability for that semimonthly period | Net tax considered collected during that period |
| Months to box | Month 1: A, B. Month 2: C, D. Month 3: E, F | Month 1: M, N. Month 2: O, P. Month 3: Q, R |
| Special September box | G | S |
Alternative method filers need to watch the timing. Tax in amounts billed during one semimonthly period is treated as collected during the first 7 days of the second following semimonthly period. So the period you enter can differ from the period you billed. The IRS example: amounts billed for communications services from June 1 to 15, 2026, are considered collected July 1 to 7, 2026, and go in box M of the third quarter return, not on the second quarter return.
That method also needs separate accounts of the tax included in amounts billed or tickets sold each month. If you are an air transportation filer, the post on regular and alternative methods for air tax goes deeper. The choice is yours to make based on your records.
A worked example with truck sales
Say a made-up dealer, Sample Truck Sales LLC, reports only IRS No. 33 (the 12% retail tax) for October through December 2026 and has no claims. Everything here is invented to show the mechanics.
- October 8: sells a tractor for $200,000. Tax: 12% = $24,000.
- November 20: sells a truck for $150,000. Tax: 12% = $18,000.
- December 3: sells a trailer for $75,000. Tax: 12% = $9,000.
The instructions allow two ways to fill the boxes. You can use the actual liability for each period, or you can divide each month’s net liability by two, as long as you use the halves for all semimonthly periods in that quarter.
| Box | Period | Actual period | Monthly amount divided by 2 |
|---|---|---|---|
| A | October 1 to 15 | $24,000 | $12,000 |
| B | October 16 to 31 | $0 | $12,000 |
| C | November 1 to 15 | $0 | $9,000 |
| D | November 16 to 30 | $18,000 | $9,000 |
| E | December 1 to 15 | $9,000 | $4,500 |
| F | December 16 to 31 | $0 | $4,500 |
| Total, line 1(b) | Quarter | $51,000 | $51,000 |
Both columns total $51,000, matching the tax on IRS No. 33. If the dealer had claimed a section 4051(d) tire credit on Schedule C, that claim would reduce net liability for its period. Because $51,000 is above $2,500, the dealer also has to deposit. To estimate the tax on a sale, try the truck excise tax calculator.
Why do the third quarter boxes work differently?
September has an extra deposit, so the instructions carry a special reporting rule. Boxes G and S are labeled “Special rule for September” and marked to complete only as instructed.
- Regular method: enter the liability for the period beginning September 26/27 and ending September 30 in box F.
- Alternative method: enter tax in amounts billed or tickets sold from September 11/12 through September 15 in box M of the fourth quarter return. Enter tax in amounts billed or tickets sold from September 16 through 30 in box N of the fourth quarter return.
That section of the instructions doesn’t spell out a separate entry for box G or box S. If you made an additional September deposit and your entries don’t seem to fit, read Regulations sections 40.6302(c)-2 and 40.6302(c)-3, which the instructions cite, or ask a tax professional.
Completing Schedule A when you file online
Keep a simple running log of Part I liability by semimonthly period during the quarter, and this schedule becomes a matter of copying figures across. When you file Form 720 online with EasyFile720, Schedule A is part of the guided filing along with your Part I categories. You enter your figures, the math is calculated, and validations catch common mistakes before you submit. For the broader picture of what Part I covers, see the Form 720 overview. An account is free to create, and you pay $39.95 per filing when you file.
FAQ
I only owe the PCORI fee. Do I complete Schedule A?▼
No. The PCORI fee is a Part II item, and the form says not to complete Schedule A for Part II taxes.
Do I enter tax or tax minus credits?▼
You enter net tax liability, which is the total liability for the period minus any claims allowed on Schedule C for that period. It is not reduced by amounts from Form 720-X.
What do I enter for a period with no tax?▼
The sources don't require a specific entry for an empty box. Publication 510 notes that you generally don't have to deposit for a period in which you incurred no tax liability.
Can I use both line 1 and line 2 on one return?▼
Yes. Line 1 holds regular method taxes and line 2 holds alternative method taxes, and each method has its own net liability total. If you report more than one tax under a method, you add them together for each period.
File Form 720 online
Create a free account with no credit card and build your return. You pay $39.95 only when you file. EasyFile720 is an IRS-authorized e-file provider, and you get an acknowledgment when the IRS accepts your return.
Sources: Form 720 (Rev. June 2026); Instructions for Form 720 (Rev. June 2026); Publication 510 (Rev. December 2025); IRS 720 Business Rules Publication 2026 Q4 v1.0. General information, not tax advice. Confirm how the rules apply to you with a qualified advisor or the IRS.
