You filed Form 2290 in July or August, got the stamped Schedule 1, and then added a truck — bought one from a dealer, picked up a used one, or pulled a spare out of the yard and put it on the road. The question everyone asks is how to add the vehicle to the return already on file. You cannot. The IRS answer in its e-file FAQis direct: if you e-file your Form 2290 and later buy one or more additional vehicles, “you must file a new Form 2290 listing only the new vehicles.” That new return has its own due date, its own prorated HVUT, and its own stamped Schedule 1.
Do you amend the old return or file a new one?
A new one. The Form 2290 instructionsallow the Amended Return box for exactly two things — additional tax from an increase in taxable gross weight, and a suspended vehiclethat exceeded the mileage limit — and add, “Don't check this box for any other reason.” The VIN Correction box is equally narrow: it fixes a VINalready listed on a filed Schedule 1, nothing else. An added truck is neither. It goes on a fresh, ordinary Form 2290 under the same EIN and business name, with only the new VIN or VINs on Schedule 1 and the new truck's first-use month on line 1.
The mistake to avoid is re-listing the trucks you already filed. The IRS system compares every return to what is on file for the same EIN, tax period, and VIN, and if it finds overlap it throws a duplicate-filing error — the IRS FAQ tells you to “confirm that you are reporting new vehicles only.” New return, new VINs only. The amendments guide covers the two situations that actually use the Amended Return box.
When is the new Form 2290 due?
By the last day of the month following the month the truck was first used on a public highway during the period — and “first used” means driven on a public road, not purchased. A truck bought in October but parked until December has a December first-use month. When the due date lands on a Saturday, Sunday, or legal holiday, the instructions move it to the next business day. For the July 2026 – June 2027 period:
| Truck first used in | New Form 2290 due by | Line 1 entry | Months taxed |
|---|---|---|---|
| July 2026 | August 31, 2026 | 202607 | 12 |
| August 2026 | September 30, 2026 | 202608 | 11 |
| September 2026 | November 2, 2026 | 202609 | 10 |
| October 2026 | November 30, 2026 | 202610 | 9 |
| November 2026 | December 31, 2026 | 202611 | 8 |
| December 2026 | February 1, 2027 | 202612 | 7 |
| January 2027 | March 1, 2027 | 202701 | 6 |
| February 2027 | March 31, 2027 | 202702 | 5 |
| March 2027 | April 30, 2027 | 202703 | 4 |
| April 2027 | June 1, 2027 | 202704 | 3 |
| May 2027 | June 30, 2027 | 202705 | 2 |
| June 2027 | August 2, 2027 | 202706 | 1 |
The dates come from the instructions' own table; the due-dates guideexplains the five shifted ones. Note that a truck added in June 2027 owes one month of tax on a return due August 2, 2027, and then goes right back on the 2027–2028 annual return due August 31, 2027 — two filings a month apart is normal, not a mistake.
How is the tax on an added truck prorated?
Under 26 USC §4481(c)(1)the tax on a truck first used after July is reckoned proportionately from the first day of the first-use month through June 30. Take the annual rate for the truck's weight category, multiply by the months in the right-hand column of the table above, and divide by 12. The vehicle categories guide has every annual rate; a few added-truck examples:
- Category V (over 75,000 lbs, $550 a year) first used in October: 9/12 × $550 = $412.50.
- Category A (55,000 lbs, $100 a year) first used in March: 4/12 × $100 = $33.33.
- Logging vehicle in Category V ($412.50 a year) first used in January: 6/12 × $412.50 = $206.25.
Two wrinkles. A used truck bought from a private seller who already paid this period's tax is computed from the month afterthe sale, and you should hold a copy of the seller's Schedule 1 in your records — the used-truck guide has the IRS example. And an added truck you expect to run 5,000 highway miles or less (7,500 agricultural) goes on the new return as a suspended vehicle in Category W at $0; it still gets its own Schedule 1.
What if you add trucks in different months?
One return per first-use month. The IRS FAQ addresses this directly: two vehicles first used in two consecutive months cannot share a return, because the tax on each depends on its own first-use month, so “you should file two Forms 2290, one for each vehicle and its partial tax period, and complete a Schedule 1 for each.” Trucks first used in the same month can go on one return together. A fleet that adds trucks steadily through the year ends up with several returns and several Schedule 1s inside a single period, so keep a simple log: VIN, first-use month, return date, Schedule 1 on file. The 25-vehicle e-file mandate applies per return, so a small added-truck return can be mailed — but e-filing it gets the Schedule 1 back the same day instead of weeks later.
How does the second Schedule 1 work?
Each return produces its own stamped Schedule 1 listing only the VINs on that return. After adding a truck you hold two for the same tax period: the July annual one for the original fleet and the new one for the added VIN. The plate office wants the one that shows the truck being registered — the annual Schedule 1 does not cover the added VIN and will not get it plated. If you are registering the truck within 60 days of buying it, the state can accept the bill of sale in place of the Schedule 1, but you still have to file and pay by the deadline above. Keep every Schedule 1 for the period with your records for at least three years after the tax was due or paid.
Next July, everything consolidates again: the added truck goes on the annual return with the rest of the fleet for the full year, and the mid-year filing is simply the record for the months it ran in the prior period. Nothing carries over and nothing needs to be amended.
Step by step: how to add a vehicle to your 2290
- Pin down the first-use month. The month the truck first ran on a public highway during the period, not the purchase date. It sets the deadline and the proration.
- Gather the truck's details. The 17-character VIN, its taxable gross weight category, and whether it is a logging or suspended vehicle. Same EIN and legal name as your first return — see the filing requirements.
- File a new Form 2290 with only the new VIN(s). Line 1 shows the first-use month; the Amended Return and VIN Correction boxes stay blank.
- Pay the prorated tax. Direct debit with the e-file, EFTPS, a card, or a check with Form 2290-V — the payment guide compares them.
- Save the second Schedule 1 and hand it to the plate office with the registration paperwork.
- Diary the annual return. The added truck rejoins the fleet on next July's Form 2290, due August 31, 2027 for the 2027–2028 period.
Fast 2290 files an added truck as its own return — first-use month, proration, and the new-VINs-only rule handled by the preparer — for $149 per vehicle, with the second stamped Schedule 1 emailed back the same business day the IRS accepts it. Our short answer on when 2290 is due for new trucks covers the deadline alone; to get the added truck filed, file your 2290 with Fast 2290 Filing.