Lacerte doesn't automatically report back the income on Form 4136, Schedule M-1, Fuel Tax Credit.
You can make this adjustment on Screen 39.1, Schedule M-1 (Book-Tax Adj.).
The instructions on Form 4136, page 2 state:
Including the Fuel Tax Credit in Income
You must include in your gross income the amount of the credit from line 17 if you took a deduction on your tax return that included the amount of the taxes and that deduction reduced your income tax liability. See Pub. 510.