You do recall that you are signing the return you are signing below this statement

"Under penalties of perjury, I declare that I have examined this return and accompanying schedules and statements, and to the best of my knowledge and
belief, they are true, correct, and complete. Declaration of preparer (other than taxpayer) is based on all information of which preparer has any knowledge"

Do you really want to start down the road of signing a return which you know has a false statement included, that affects the issuance of a refund (or at least the timing thereof?)