I need to admend my taxes for the fuel tax

You amend your own tax return.

If the return is accepted you will have to amend your original tax return. An amended return, Form 1040-X, can only be printed and mailed to the IRS if the original tax return was not e-filed. The IRS will take up to 20 weeks or longer to process an amended tax return.

Before starting to amend the tax return, wait for the tax refund to be received or the taxes due to be paid and processed by the IRS.

See this TurboTax support FAQ for amending a federal tax return - https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-change-correct-return-already-filed/L4VjJ9BA2_US_en_US?uid=ld1n99kr

See this TurboTax support FAQ for amending a state tax return - https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/need-amend-state-return/L3hGFyaPp_US_en_US?uid=ll3zvib7

Also, see this TurboTax article on Form 4136: Credit for Federal Tax Paid on Fuels - https://turbotax.intuit.com/tax-tips/small-business-taxes/what-is-form-4136-credit-for-federal-tax-paid-on-fuels/L7Zqhsgo8

IRS Form 4136 and Instructions - https://www.irs.gov/forms-pubs/about-form-4136