I am not an accountant or a professional tax preparer. You need to explain why you needed to file form 8453.
here is what I found about form 8453:
FILE THIS FORM ONLY IF YOU ARE ATTACHING ONE OR MORE
OF THE FOLLOWING FORMS OR SUPPORTING DOCUMENTS.
Check the applicable box(es) to identify the attachments.
Form 1098-C, Contributions of Motor Vehicles, Boats, and Airplanes (or equivalent contemporaneous written acknowledgement)
Form 2848, Power of Attorney and Declaration of Representative (or POA that states the agent is granted authority to sign the return)
Form 3115, Application for Change in Accounting Method
Form 3468 - Attach a copy of the first page of NPS Form 10-168, Historic Preservation Certification Application (Part 2—Description of Rehabilitation), with an indication that it was received by the Department of the Interior or the State Historic Preservation Officer, together with proof that the building is a certified historic structure (or that such status has been requested)
Form 4136 - Attach the appropriate certificates and, if applicable, the appropriate reseller statements for biodiesel, renewable diesel, and sustainable aviation fuel claims
Form 5713, International Boycott Report
Form 8283, Noncash Charitable Contributions, Section A (if any statement or qualified appraisal is required), or Section B, Donated Property, and any related attachments (including any qualified appraisal or partnership Form 8283)
Form 8332, Release/Revocation of Release of Claim to Exemption for Child by Custodial Parent (or certain pages from a divorce decree or separation agreement that went into effect after 1984 and before 2009) (see instructions)
Form 8858, Information Return of U.S. Persons With Respect to Foreign Disregarded Entities (FDEs) and Foreign Branches (FBs)
Form 8864 - Attach the appropriate certificates and, if applicable, the appropriate reseller statements for biodiesel, renewable diesel, and sustainable aviation fuel claims
Form 8949, Sales and Other Dispositions of Capital Assets (or a statement with the same information), if you elect not to report your transactions electronically on Form 8949
When and Where To File
If you are an electronic return originator (ERO), you must
mail Form 8453 to the IRS within 3 business days after
receiving acknowledgement that the IRS has accepted
the electronically filed tax return.
https://www.irs.gov/pub/irs-pdf/f8453.pdf
hope this helps
